Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1920

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1919

Circular / United States Department of Agriculture, Division of Agrostology.

no. 1-36

An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian, by Nathaniel Lord Britton ... and Hon. Addison Brown ...

v. 1

Bulletin / United States Department of Agriculture, Division of Agrostology.

no. 7-11 (1897-1898)

Bulletin / United States Department of Agriculture, Division of Agrostology.

no. 12-18 (1898-1899)

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1921

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... / Smithsonian Institution, United States National Museum.

1923