00312nam a2200109 a 450000500170000008200130001710000270003024500370005726000310009430000270012550000500015220251203090505.0  a577bECO  aPolunin, Nicholas ed.,  aEcosystem theory and application  aNew YorkbJohn Wileyc1986  axvi, 445p.c22 cm.bHB  aincludes bibliographical references and index