@article {8933, title = {The genus Tetragnatha (Araneae, Argiopidae) in Panama}, journal = {Bulletin of the Museum of Comparative Zoology}, volume = {116}, year = {1957}, pages = {p.301-354}, author = {Chickering, Arthur M} } @article {8898, title = {The spider genera Enoplognatha, Theridion, and Paidisca in America north of Mexico (Araneae, Theridiidae).}, journal = {Bulletin of the American Museum of Natural History}, volume = {112}, year = {1957}, pages = {1-124}, author = {Levi, Herbert W} } @article {8892, title = {The spider genera Crustulina and Steatoda in North America, Central America, and the West Indies (Araneae, Theridiidae)}, journal = {Bulletin of the Museum of Comparative Zoology}, volume = {117}, year = {1957}, pages = {367-424}, author = {Levi, Herbert W} } @article {8884, title = {The North American spider genera Paratheridula, Tekellina, Pholcomma and Archerius (Araneae: Theridiidae).}, journal = {Transactions of the American Microscopical Society}, volume = {76}, year = {1957}, month = {105-115}, author = {Levi, Herbert W} } @article {8860, title = {The spider genera Chrysso and Tidarren in America}, journal = { Journal of The New York Entomological Society}, volume = {63}, year = {1957}, pages = {59-81}, author = {Levi, Herbert W} } @article {8606, title = {Bisher unbekannt gebliebene Araneen-M{\"a}nnchen und -Weibchen des Wiener Naturhistorischen Museums (1. Teil).}, journal = {Annalen des Naturhistorischen Museums in Wien}, volume = {61}, year = {1957}, pages = {254-272}, author = {Erich Kritscher} } @article {8459, title = {A new zodariid spider from Panama}, journal = {Breviora}, volume = {69}, year = {1957}, pages = {1-7}, author = {Chickering, Arthur M} }