00307cam a22001091  4500040000800000082003300008100001700041245002500058260005300083300003700136650002400173  cDLC00a575.3a574 UNI 1952 A060 Or.1 aDice, Lee R.10aNatural communities.  aAnn Arbor,bUniversity of Michigan Press,c1952.  ax, 547 p.billus., maps.c26 cm. 0aBiotic communities.