@article {643,
	title = {Drawings of a Comet},
	volume = {XVIII},
	year = {1910},
	keywords = {comet, Douglass, drawing, popular astronomy},
	author = {Douglass, A.E.}
}
@article {635,
	title = {A Summary of Planetary Work at the Lowell Observatory and the Conditions Under Which It Has Been Performed},
	year = {1899},
	keywords = {Douglass, lowell observatory, popular astronomy, summary},
	author = {Douglass, A.E.}
}
@article {641,
	title = {Atmosphere, Telescope and Observer},
	year = {1897},
	keywords = {astronomy, atmosphere, Douglass, observation, observer, popular astronomy, telescope},
	author = {Douglass, A.E.}
}
