000 00286nam a2200121Ia 4500
008 170101s1973 xx 000 0 und d
082 _a639.9 UDA
100 _aUdall Stewart L.
245 0 _aConserving for Tomorrow
260 _bUnited State..
_c1973
300 _a27 p
942 _2ddc
_cB
999 _c5216
_d5216