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999 _c68112
_d68112
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040 _aBD-DhPL
_bEnglish
_cBD-DhPL
_dBD-DhPL
082 _a333.7273 / G978c
245 _aConservation in the United States /
_cA. F. Gustafson ...[et al.].
250 _a3rd ed.
260 _aNew York :
_bComstock,
_cc 1949.
300 _aix, 534 p. :
_bill. ;
_c24 cm.
500 _aIncludes index.
508 _a337
651 _aUnited States
_vEconomic conditions.
_9256203
651 _aUnited States
_vNatural resources.
_9256204
700 _aGustafson, A. F. ...[et al.].
_9256205
942 _2ddc
_cBK