Author

Fred Runk Johnson

2 books found

Placeholder cover for Spraying experiments against the grape leaf hopper [Tychlocyba comes Say] in the Lake Erie Valley in 1911

Spraying experiments against the grape leaf hopper [Tychlocyba comes Say] in the Lake Erie Valley in 1911

Fred Runk Johnson · First published 1912

Placeholder cover for The grape-berry moth

The grape-berry moth

Fred Runk Johnson, A. G. Hammar · First published 1912