Gertsch, Willis John, 1906-2005-10-062005-10-061964http://hdl.handle.net/2246/330721 p. : ill., maps ; 24 cm.Includes bibliographical references (p. 18-21).1947657 bytesapplication/pdfen-USQL1 .A436 no.2188, 1964ZygiellaSpiders -- United StatesSpiders -- CanadaArachnida -- United StatesArachnida -- CanadaThe spider genus Zygiella in North America (Araneae, Argiopidae). American Museum novitates ; no. 2188text