00469nam a2200193Ia 4500008004100000041001200041082001100053100001600064100001100080245004300091260001700134260002500151260000900176300001500185365002500200650001600225650001200241650002200253150909s9999    xx            000 0 und d  aEnglish  bHAR/SC  aHardy J T    eAuthor  aScience technology and the environment  aphiladelphia  bW B Saunders Company  c1975  a329  Pages  aRs .65 .80            acybernetics  aEcology  aphysical universe