PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Manual_of_the_botany_of_the_northern_United_States_(IA_manualofbotanyof00gray_2).pdf...
Manual of the botany of the northern United States ( ) Author Gray, Asa, 1810-1888 Title Manual of the botany of the northern United States Publisher...