Bulletin / U.S. Department of Agriculture, Bureau of Plant Industry.

no.21-27 (1902-1903)

Bulletin / U.S. Department of Agriculture, Bureau of Plant Industry.

no.218-228 (1911-1912)

Bulletin / Ontario Department of Agriculture.

146-168

Bulletin / U.S. Department of Agriculture, Bureau of Plant Industry.

no.58-67 (1904) [incomplete]

Bulletin / U.S. Department of Agriculture, Bureau of Plant Industry.

no.210-217 (1911) [incomplete]

Annual report of the Pennsylvania Department of Agriculture ...

9

Annual report of the Office of Experiment Stations ... / U.S. Department of Agriculture.

1911

Annual report of the Office of Experiment Stations ... / U.S. Department of Agriculture.

1903

Annual report of the Office of Experiment Stations ... / U.S. Department of Agriculture.

1910

Annual report of the Pennsylvania Department of Agriculture ...

7, pt. 2

Annual report of the Pennsylvania Department of Agriculture ...

6, pt. 2

Annual report of the Pennsylvania Department of Agriculture ...

7, pt. 1

Annual reports of the Department of Agriculture ...

1919

Annual report of the Pennsylvania Department of Agriculture ...

13

Annual report of the Pennsylvania Department of Agriculture ...

8, pt. 1