American spiders /
Gertsch, Willis J. 1906-
American spiders / Willis J. Gertsch - 2nd ed. - New York : Van Nostrand Reinhold Co, 1979 - xiii, 274 p., 32 leaves of plates : ill., (some col.) ; 24 cm.
Includes index
Bibliography: p. 259-260
0442226497
78-6646
Spiders--North America
Arachnida--North America
American spiders / Willis J. Gertsch - 2nd ed. - New York : Van Nostrand Reinhold Co, 1979 - xiii, 274 p., 32 leaves of plates : ill., (some col.) ; 24 cm.
Includes index
Bibliography: p. 259-260
0442226497
78-6646
Spiders--North America
Arachnida--North America