00268nam a22001097a 4500003000400000008004100004082002000045100001700065245003300082260003500115300000800150OSt231225b        |||||||| |||| 00| 0 eng d  a595.709794bU8A  aUsinger,R.L.  aAquatic insect of Calfornia   aUniversity of Calfornia c1956  a508