- eBookThe Elements of Botany, For Beginners and For SchoolsAsa Gray
- eBookThe Elements of Botany For Beginners and For SchoolsAsa Gray
- eBookThe Elements of Botany, For Beginners and For SchoolsAsa Gray
- eBookThe Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and TennesseeAsa Gray
- eBookThe Manual of the Botany of the Northern United StatesAsa Gray
- eBookDarwiniana; Essays and Reviews Pertaining to DarwinismAsa Gray
- eBookDarwiniana; Essays and Reviews Pertaining to DarwinismAsa Gray
- eBookDarwiniana; Essays and Reviews Pertaining to DarwinismAsa Gray
- eBookThe Manual of the Botany of the Northern United StatesAsa Gray
- eBookThe Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and TennesseeAsa Gray
- eBookDarwinianaAsa Gray
- eBookDarwiniana; Essays and Reviews Pertaining to DarwinismAsa Gray