172 resultados para studies of public


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"Project No. 1426. Task No. 142612."

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"Contributions from the Zoölogical laboratory of the Museum of comparative zoölogy at Harvard college. E. L. Mark, director. no. 199."

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"From the Laboratory of Genetics of the Bussey Institution."

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Preface signed: Richard Twining.

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"The research reported ... was performed pursuant to Contract no. 8143 with the cooperative research Branch, United States Office of Education, Department of Health, Education, and Welfare."

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Pt.1. Cultivation of Biophalaria ...[by] John I. Bruce and Myron G. Radke. Pt. II. Mass cultivation of Oncomelania ...[by] George M. Davis.

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Publisher's catalog at end.

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