Biblioteca Digital

11 resultados para economic thresholds

em Biodiversity Heritage Library, United States

A report upon the scallop fishery of Massachusetts : including the habits, life history of Pecten irradians, its rate of growth, and other facts of economic value.

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The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.

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v.1 pt.1

The ornithology of Illinois. Part I. Descriptive catalogue. By Robert Ridgway. Part II. Economic ornithology. By S. A. Forbes. Pub. by the authority of the state Legislature.

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v.2 pt.1

The birds of Wyoming, with an explanation of recent changes in their distribution; economic aspect also considered. By B. H. Grave and Ernest P. Walker.

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Applied and economic botany, especially adapted for the use of students in technical schools, agricultural, pharmaceutical and medical colleges, and also as a book of reference for chemists, food analysts and students engaged in the morphological and physiological study of plants,

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Entomology, with special reference to its biological and economic aspects.

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Elementary textbook of economic zoology and entomology, by Vernon Lyman Kellogg ... and Rennie Wilbur Doane.

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Sugar and sugar making / by James B. McNair, Asst. Curator of Economic Botany.

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no.13(1927)

The Tinguian; social, religious, and economic life of a Philippine tribe / by Fay-Cooper Cole -- with a chapter on music by Albert Gale, 83 plates and 26 text-figures -- Berthold Laufer --

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v.14:no.2(1922)

Photographs of medicinal and economic plants from natural specimens: plates, figures /by Charles L. Lochman.

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Economic plants. An index to economic products of the vegetable kingdom in Jamaica. Comp. by William Fawcett ...

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