Insect pollination of cultivated crop plants /
McGregor, Samuel Emmett, 1906-
Insect pollination of cultivated crop plants / by S. E. McGregor. - Washington : Agricultural Research Service, U.S. Dept. of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976. - viii, 411 p. : ill. ; 30 cm. - Agriculture handbook ; no. 496 . - Agriculture handbook (United States. Dept. of Agriculture) ; no. 496. .
Includes bibliographies and indexes.
Pollination by insects.
Plants, Cultivated.
Bee culture.
Honeybee.
S21 / .A37 no. 496
630/.8 s 582/.01/66
Insect pollination of cultivated crop plants / by S. E. McGregor. - Washington : Agricultural Research Service, U.S. Dept. of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1976. - viii, 411 p. : ill. ; 30 cm. - Agriculture handbook ; no. 496 . - Agriculture handbook (United States. Dept. of Agriculture) ; no. 496. .
Includes bibliographies and indexes.
Pollination by insects.
Plants, Cultivated.
Bee culture.
Honeybee.
S21 / .A37 no. 496
630/.8 s 582/.01/66