 | Hawksworth, Frank G., 1926- 1n | (2) |
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 | Hawksworth, Frank G., 1926- 1n; Biology and classification of dwarf mistletoes (Arceuthobium) / by Frank G. Hawksworth and Delbert Wiens. Washington, D.C. : Forest Service, U.S. Dept. of Agriculture, 1972. | |
| Hawksworth, Frank G., 1926- 1n; Mistletoes on introduced trees of the world / by Frank G. Hawksworth. Washington, D.C. : Forest Service, U.S. Dept. of Agriculture, 1974. | |
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