Aranzadi Zientzia Elkartea Liburutegia

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The north american bolas spiders of the genera mastophora and Agatostichus / Willis J. Gertsch.

by Gertsch, Willis J, 1906-1998.

Material type: book Book Publisher: New York : [s.n.], 1955Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 GER] (1).
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The spider genera Xysticus, Coriarachne, and Oxyptila (Thomisidae, Misumeninae) in North America / Willis J. Gertsch.

by Gertsch, Willis J, 1906-1998.

Material type: book Book Publisher: New York : [s.n.], 1953Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 GER] (1).
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The spider family dictynidae in America north of Mexico / Ralph V. Chamberlin, Willis J. Gertsch.

by Chamberlin, Ralph V, 1879-1967 | Gertsch, Willis J, 1906-1998.

Material type: book Book Publisher: New York : [s.n.], 1958Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 CHAM] (1).
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Studies of North American scorpions of the genera Uroctonus and Vejovis (Scorpionida, Vejovidae) / Willis J. Gertsch, Michael Soleglad.

by Gertsch, Willis J, 1906-1998 | Soleglad, Michael.

Material type: book Book Publisher: New York : [s.n.], 1972Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 GER] (1).
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The spider genus loxosceles in North America, Central America, and the West Indies (Araneae, Loxoscelidae) / Willis J. Gertsch, Franklin Ennik.

by Gertsch, Willis J, 1906-1998 | Ennik, Franklin.

Material type: book Book Publisher: New York : [s.n.], cop. 1983Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 GER] (1).
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The Spatial and Temporal Partitioning of a Deset Spider Community, With Descriptions of New Species / Willis J. Gertsch and Susan E. Riechert.

by Gertsch, Willis J, 1906-1998 | Riechert, Susan E, 1945-.

Material type: book Book Publisher: New York : American Museum of Natural History, 1976Availability: Items available for loan: Biblioteca Aranzadi [Call number: 595.4 GER] (1).
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