Insect pollination of cultivated crop plants /
by S. E. McGregor.

APA Citation

McGregor, S. Emmett., United States. Agricultural Research Service. (1976). Insect pollination of cultivated crop plants. Washington: U.S. Dept. of Agriculture, Agricultural Research Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

McGregor, Samuel Emmett, 1906-, and United States. Agricultural Research Service. Insect Pollination of Cultivated Crop Plants. Washington: U.S. Dept. of Agriculture, Agricultural Research Service : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976.