000			003150000a22001450004500
245			_aRocks and minerals
100			_aWatson, Janet
250			_a2nd ed.
260			_aLondon _bAllen and Unwin _c1979
300			_a72p. : ill.
020			_a0045510318
080			_a553 _bW3
041			_aEN
942			_cBK
999			_c111023 _d111023