@misc{Metcalf_Clell_Lee_(1888–1948)_Destructive_1939,
 author={Metcalf, Clell Lee (1888–1948) and Flint, Wesley Pillsbury (1882–1943)},
 copyright={Public Domain},
 address={New York},
 howpublished={online},
 year={1939},
 publisher={McGraw-Hill Book Company, Inc.},
 language={eng},
 title={Destructive and useful insects their habits and control},
 type={Text},
 URL={http://www.rcin.org.pl/Content/147602/PDF/WA488_182822_1336_Metcalf-Insects.pdf},
 keywords={Insect pests, Beneficial insects, Economic entomology, Insects - Pests - Canada, Insects - Pests - United States, Insecticides},
}