000 00338nam a22001217a 4500
082 _a625.735
_bNAT
100 _aNational research council
245 _aShales and swelling soils
_cNational research council
260 _aWashington:
_bPrinted in the United states of America,
_c1981.
300 _a94p.:
_bill.;
650 _aMCE
942 _cBK
999 _c7847
_d7847