000 00241pam a2200109a 44500
082 _aTR
_bRI-8394
100 _aC. B. Cavison
245 1 _aCristobalite in fire clay calcines
260 _a
_b
_c
700 _aH. Heystek
997 _aTR4899 C
999 _c405310
_d405310