TY - BOOK AU - Kula,Erhun TI - Economics of natural resources and the environment SN - 0412363305 AV - HC79.E .K85 1992 U1 - 333.7 20 PY - 1992/// CY - London, New York PB - Chapman & Hall KW - Natural resources KW - Mathematical models KW - Environmental economics N1 - Includes bibliographical references (p. 271-280) and indexes ER -