00313nam a2200109Ia 450000500170000000800410001708200160005810000170007424500620009126000420015330000080019520260224040905.0260224s9999||||xx |||||||||||||| ||und||  a634.906 DAV  aDavis, L.S.  0aForest management : to sustain ecological, economic, and   aBoston : Mc-Graw Hill Book Co. c2001  a804