Biblioteca Digital

4 resultados para Harriet Tubman

em Biodiversity Heritage Library, United States

The wayside flowers of summer; a study of the conspicuous herbaceous plants blooming upon our northern roadsides during the months of July and August, by Harriet L. Keeler; illustrated by Mary Keffer.

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Our early wild flowers : a study of the herbaceous plants blooming in early spring in the northern states / by Harriet L. Keeler. Illustrated by Mary Keffer and Eloise P. Luquer.

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Our northern autumn, a study of its characteristic flowers, its brilliant foliage and its conspicuous fruits, by Harriet L. Keeler. Illustrated by Mary Keffer.

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Growth hormones in plants. Authorized English translation of Die wuchsstofftheorie und ihre bedeutung für die analyse des wachstums und der wachstumsbewegungen der pflanzen.

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