The Sierra Leone diamonds : an economic study covering the years 1952-1961 / [by] H. L. Van der Laan. Laan, H. L., van der. Diamond mines and mining Sierra Leone. Diamonds. 338.2782 VAS Includes index and bibliographycal references London : Oxford University Press, 1965. 1965. 1965 Text 234 P. : eng Sierra Leone.