000 00306 a2200121 4500
080 _a549
_bW 929 C
245 1 _aClays
_btheir nature, origin and general properties
_cby W.E. Worral
260 _aLondon
_bMaclaren
_c1968
650 _aClays
100 1 _aWorrall, W.E.
_d
300 _a128 p.
901 _a143257
999 _c68501
_d68501