003010000a22001210004500060000800000082001200008100001500020245004600035260003400081260000900115300000800124650004700132  a100  a592 NIG  aNigam, H C  aUniversity course of invertebrate zoology  aJullundpur, S Nigan & Company  c1965  a694  aInvertebrates/ Parazoa/ Metazoa/ Coelomata