The pollination of pear flowers /
Waite, Merton B.
The pollination of pear flowers / by Merton B. Waite - Washington : Government printing Office, 1894 - 86 p. : ill. ; 24 cm - Bulletin. U.S. Department of agriculture, Division of vegetable pathology ; n. 5 .
The pollination of pear flowers / by Merton B. Waite - Washington : Government printing Office, 1894 - 86 p. : ill. ; 24 cm - Bulletin. U.S. Department of agriculture, Division of vegetable pathology ; n. 5 .