@conference {721,
	title = {Zodical Light and Counter-Glow and the Photography of Large Areas and Faint Contrasts},
	booktitle = {Royal Photographic Society of Great Britain},
	year = {1915},
	keywords = {astronomy, contrasts, counter glow, Douglass, photography, zodical light},
	author = {Douglass, A.E.}
}
