Forest resource management : decision making principles and cases / W. A.DUERR., D. E. TEEGUARDEN,S. GUTTENBERG, Neils B. CHRISTIANSEN.. DUERR, W. A. TEEGUARDEN, D. E. CHRISTIANSEN, Neils B. GUTTENBERG, S. Business Management. 658 DUF New York : O. S. U. Book Stores ; 1976 1976 1976 Text vol. 2 eng