000			00283nam a2200097 4500
100			_aGeological Soc. of London
245			_a Journal of GSL,vol.128 _cGeological Soc. of London
260			_aGeological Soc. of London _c1972
260			_aGeological Soc. of London _c1972
942			_cCR
999			_c336877 _d336877