William D. Brackenridge letters - Brackenridge, William D. (William Dunlop),; Gray, Asa, (1850)
https://www.biodiversitylibrary.org/bibliography/177228
Keywords: (1838-1842)|(William Dunlop); |1810-1888|1810-1893|Brackenridge; William D|Correspondence|Gray; Asa; |Horticulturists|United States Exploring Expedition|