00988cam a22002891 4500 gs 63000009 DLC 20260227111412.0 860218s1961 sa ab b 000 0 eng c gs 63000009 (OCoLC)13164405 U.S. Geol. Survey. Libr. NhD DLC eng afr premarc QE325 .A53 no. 33 De Jager, D. H. The sillimanite deposits in Namaqualand near Pofadder, by D.H. de Jager and J.W. von Backström. Pretoria, Govt. Printer, 1961. 49 p. illus., maps (part fold.) diagrs., tables. 24 cm. Geological Survey (South Africa). Bulletin 33 Summary in Afrikaans. Bibliography: p. 49. Sillimanite. Ore deposits South Africa Namaqualand. Von Backström, J. W., joint author. Bulletin (Geological Survey (South Africa)) ; 33. 29662 29662