000 00294nam a2200121Ia 4500
008 211209s1983 xx 000 0 und d
041 _aeng
082 _a712 N83 COW/SMI
100 _aCOWAN, HENRY J
245 _aENVIRONMENTAL SYSTEMS
260 _aNEWYORK
_bVAN NOSTRAND
_c1983
300 _a240
999 _c27876
_d27876