000 00391 am a2200121 a 4500
100 1 _aAnderson, M.S., Byers, H.G.
245 1 _aCharacter of the colloidal materials in the profiles of certain major soil groups
260 _aWashington
_c1931
300 _a1-24 p.
942 _2udc
_cB
440 _aSoil United States Department of Agriculture. Technical Bulletin No. 228
901 _aS50186
999 _c107096
_d107096