00872cam a22002771 4500 gs 48000169 DLC 20260227111354.0 940525s1946 enkab b 000 0 eng c gs 48000169 (OCoLC)30491785 U.S. Geol. Survey. Libr. IEN IEN DLC premarc QE461 .J3 552.1 Jacobson, Reginald Ronald Eric. The pegmatites of central Nigeria, by R. Jacobson and J.S. Webb. [Colchester] 1946. 61 p. illus., 4 fold. maps (in pocket) 26 cm. Nigeria. Geological Survey. Bulletin no. 17 "References": p. 60. Pegmatites. Mineralogy Nigeria. Webb, J. S., joint author. Bulletin (Geological Survey of Nigeria) ; no. 17. 28279 28279