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Produktiestatistieken industrie / Fijn aardewerk- en porceleinindustrie
(1994)
The Norwegian and Swedish markets for Mozambican bentonite : part 1: No. 20/87 ; part 2: No. 24/88
Mabote, Juvenal, (1988)
Prospects for bentonite based industries in Gujarat
Bhatt, J. V., (1990)
Fire clay resources of Japan
Lee, Donald E., (1950)