000 00309 am a2200121 a 4500
100 1 _a
_d
245 1 _aSoil survey manual
260 _aWashington
_c1951
300 _a1-503 p.
942 _2udc
_cB
440 _aSoil United States Department of Agriculture. Agriculture Handbook Number. 18
901 _aS49469
999 _c105991
_d105991