000 00326 a2200145 4500
082 _a551.43
_bYOS
100 _aYoung, Anthony
_942268
245 _aSlope development
_cAnthony Young
260 _aLondon:
_bMacmillan,
_c1977.
300 _aiv, 35p.
500 _aPB
546 _aEng
650 _aslopes
_942269
942 _cBK
999 _c55139
_d55139