 | Owens, Charles D., 1921- 4n | (3) |
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 | Owens, Charles D., 1921- 4n; The thermology of wintering honey bee colonies / . Washington : U.S. Dept. of Agriculture, 1971. | |
| Owens, Charles D., 1921- 4n; Electric heating of honey bee hives / . Washington : U.S. Dept of Agriculture, 1967. | |
| Owens, Charles D., 1921- 4n; An analysis of beekeeping production costs and returns / . Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1973. | |
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