Base pairing modes and replicative properties of site-specific urea residues in DNA حسب Altamirano, Alvin A.

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An environmental history of the world humankind's changing role in the community of life حسب Hughes, J. Donald (Johnson Donald) 1932-

Ecological relations in historical times human impact and adaptation

A History of the ecosystem concept in ecology more than the sum of the parts. حسب Golley, F. B.