@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.} } @article {677, title = {Photographs of the Zodical Light}, journal = {Astronomical Society of the Pacific}, volume = {XIII}, year = {1901}, keywords = {Douglass, photograph, zodical light}, author = {Douglass, A.E.} } @article {678, title = {Photographs of the Zodical Light}, year = {1900}, keywords = {astronomy, Douglass, photograph, photographs, zodical light}, author = {Douglass, A.E.} }