TY - GEN AU - Simmons,I.G. TI - Earth, Air and Water: Resources and environment in the late 20th century SN - 9780340524152 AV - GF 41 SIM 1991 PY - 1991/// CY - London PB - Edward Arnold KW - Human ecology KW - Natural resources KW - Conservation of natural resources N1 - includes index; Includes bibliographical references ER -