Instructions in reference to collecting nests and eggs of North American birds, including circular in reference to the history of North American grasshoppers and circular in reference to collecting North American shellsv. 2No. 91–22
Smithsonian Institution. 1860. "Instructions in reference to collecting nests and eggs of North American birds, including circular in reference to the history of North American grasshoppers and circular in reference to collecting North American shells." Smithsonian Miscellaneous Collections, 2, (9) 1–22.