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Summer birds from the Yucatan Peninsula, Mexico
Author: Klaas, Erwin E.
Year: 1968
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Ecology of the trematode, Clinostomum marginatum, and its hosts in eastern Kansas
Author: Klaas, Erwin E.
Call no: RP9394
Year: 1963
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Sunning of bank swallows and cliff swallows
Author: Barlow, Jon C.; Klaas, Erwin E.; Lenz, John L.
Call no: RP9863
Year: 1963
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