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New "intermediate form" ties seacows firmly to land.
Repts. Natl. Center for Science Education (Berkeley, Cal.) 21(5-6): 38-42. 1 fig. "Sept.-Dec. 2001" [mailed Mar. 2002].
–Describes how Pezosiren portelli and other fossil sirs. demonstrate the fact of major evolutionary change in a group of mammals.
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