@article {40857,
	title = {Comment: the effects of direct-beam light on overcast-day estimates of light availability},
	volume = {27},
	year = {1997},
	pages = {272-274},
	publisher = {Canadian Journal of Forest Research},
	url = {http://article.pubs.nrc-cnrc.gc.ca/RPAS/RPViewDoc?_handler_=HandleInitialGet\&calyLang=eng\&journal=cjfr\&volume=27\&articleFile=x96-171.pdf},
	author = {Stadt, K. J. and Landh{\"a}usser, S. M. and Stewart, J. D.}
}
