00422nam a2200157Ia 4500008004100000020001500041082002100056100002200077245005100099250000600150260004000156300000800196650001800204650002400222653001800246170901s1978    xx            000 0 und d  a0471042498  a592.092973bP35F  aPennak, Robert W. 0aFresh water invertebrates of the United States  a2  aNew YorkbJohn Wiley and Sonsc1978  a803  aPure Sciences  aZoological sciences  aInvertebrates