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1984
Kotlyar, L. S., Sparks B. D., & Kodama H. (1984).  Some chemical and mineralogical properties of fine solids derived from oil sands. 1(2), 99-106.
Kotlyar, L. S., Sparks B. D., & Kodama H. (1984).  Some chemical and mineralogical properties of fine solids derived from oil sands. 1(2), 7 pages .
1985
Kotlyar, L. S., Sparks B. D., Kodama H., & Grattan-Bellew P. E. (1985).  The distribution of inorganic matter-humic complexes during a solvent extraction-spherical-agglomeration process for bitumen recovery from Athabasca oil sand. 2(2), 121-130.
Kotlyar, L. S., & Sparks B. D. (1985).  Isolation of inorganic matter-humic complexes from Athabasca oil sands. 2(2), 103-111.
1986
Kotlyar, L. S., Sparks B. D., & Kodama H. (1986).  Effect of sodium pyrophosphate treatment on the separation of organic compounds from agglomerated oil sand solids. 65(9), 1221-1225.
1987
Kotlyar, L. S., Kodama H., Sparks B. D., & Grattan-Bellew P. E. (1987).  Non-crystalline inorganic matter-humic complexes in Athabasca oil sand and their relationship to bitumen recovery. 2(3), 253-271.
Kotlyar, L. S., Kodama H., Sparks B. D., & Grattan-Bellew P. E. (1987).  Non-crystalline inorganic matter-humic complexes in Athabasca oil sand and their relationship to bitumen recovery. 2(3), 253-271.
Woods, J. R., Kumar A., Sparks B. D., & Kotlyar L. S. (1987).  Use of a density meter for analysis of process streams obtained during solvent extraction of bitumen from Athabasca oil sands. 3(4), 183-193.
1988
Kotlyar, L. S., & Ripmeester J. A. (1988).  Application of solid-state SI-29 and C-13 nuclear magnetic-resonance spectroscopy to the characterization of inorganic matter humic complexes in Athabasca oil sands. 54.
Yang, P. W., Mantsch H. H., Kotlyar L. S., & Woods J. R. (1988).  Characterization of Athabasca tar sand maltenes by diffuse reflectance infrared spectrometry. 2(1), 26-31.
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Montgomery D. S. (1988).  Characterization of organic-rich solids fractions isolated from Athabasca oil sand using a cold water agitation test. 67(2), 221-226.
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Woods J. (1988).  Comparative study of organic matter derived from Utah and Athabasca oil sands. 67(11), 1529-1535.
Kotlyar, L. S., & Ripmeester J. A. (1988).  CP/MAS C-13 NMR characterization of humic matter derived from Athabasca and Utah oil sands. 11.
Kotlyar, L. S., Sparks B. D., & Kodama H. (1988).  Properties of fines size fractions in relation to the distribution of humic - inorganic matter complexes in Athabasca oil sands. 4(4), 277-285.
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Montgomery D. S. (1988).  Characterization of organic-rich solids fractions isolated from Athabasca oil sand using a cold water agitation test. 67(2), 5 pages . Abstract
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Montgomery D. S. (1988).  Characterization of oil sands solids closely associated with Athabasca bitumen. 67(6), 6 pages . Abstract
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Kodama H. (1988).  Comparative study of organic rich solids present in Utah and Athabasca oil sands. 10 pages . Abstract
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Woods J. (1988).  Comparative study of organic matter derived from Utah and Athabasca oil sands. 67(11), 6 pages . Abstract
1989
Kotlyar, L. S., Ripmeester J. A., & Sparks B. D. (1989).  13C NMR charcterisation of humic matter present in different oil sands. 7, 477-.
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Kodama H. (1989).  Comparative study of organic rich solids present in Utah and Athabasca oil sands. In : Fourth UNITAR/UNDP International Conference on Heavy Crude and Tar Sands, Meyer, R. F. and Wiggins, E. J. (eds.). Paper No. 16, 59-69.
Darcovich, K., Kotlyar L. S., Tse W. C., Ripmeester J. A., Capes C. E., & Sparks B. D. (1989).  Wettability study of organic-rich solids separated from Athabasca oil sands. 3(3), 386-391.
Kotlyar, L. S., Ripmeester J. A., & Sparks B. D. (1989).  13NMR characterization of humic matter present in different oil sands. 7(5-6), 477-505.
1990
Kotlyar, L. S., Ripmeester J. A., Sparks B. D., & Woods J. R. (1990).  Characterization of strongly bound organic matter present in Athabasca tailings pond sludge using a combination of alkaline and supercritical gas extractions.
Kotlyar, L. S., Sparks B. D., & Kodama H. (1990).  Isolation and characterization of organic-rich solids present in Athabasca tailings pond sludge. 6(1), 41-51.
Kotlyar, L. S., Ripmeester J. A., & Sparks B. D. (1990).  Isolation and characterization of various types of organic matter in oil sands tailings sludge. 69(12), 1522-1526.

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