TY - BOOK AU - Simmons, I.G. TI - Earth, Air and Water: resource and environment in the late 20th century SN - 034052415 4 U1 - 304.28 PY - 1991///(1992 Printing) CY - London PB - Edward Arnold KW - Air and water KW - Economics of land and energy N1 - Includes index ER -