000 00424 a2200145 4500
020 _a0697204561
080 _a577.4
_bC917U
245 1 _aUnderstanding our environment
_bAn introduction
_cby William P. Cunningham
260 _aDubuque
_bWm. C. Brown Publishers
_c1994
650 _aEnvironment
100 1 _aCunningham, William P.
300 _a389 p.
040 _aIARI, New Delhi
901 _a201136
999 _c70683
_d70683