000 00311 am a2200121 a 4500
245 1 _aPurification of clay
260 _cNew Delhi
300 _a1-7 p.
100 1 _aDas, S.R., Saboor, M.A.
942 _2udc
_cB
440 _aPurification, Clay Bulletins Of Indian Industrial Research. No. 9
901 _aS58237
999 _c101180
_d101180