00259nam a22001217a 4500020001500000082001300015100002100028245002700049250001200076260002600088300001100114650001200125  a0471544086  a574bBRU  aBrum, Gilbert D.  aBiology Exploring Life  a2nd.ed.  aNew YorkbWileyc1993  a1030p.  aBiology