00431nam a2200133Ia 4500008004100000020001800041040003800059100002200097245010000119250001600219260003100235300001700266653001400283211230s9999    xx            000 0 und d  a0 393 09372 7  cJayakar Knowledge Resource Centre  aBenarde, Melvin A 0aOur precarious habitat: an integrated approach to understanding man's effect on his environment  aRevised ed.  bW W NortonaNew Yorkc1973  axiv,448p. p.  aPollution