1. 1
   Report of the Geological Survey Department

   Freetown : Govt. Printer,

   v. ; 25 cm.

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2. 2
   Report of the Geological Survey for the year

   出版 1954

   Freetown : Govt. Printer, 1954-

   v. ; 25 cm.

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3. 3
   Annual report of the Geological Survey for the year

   出版 1951

   Freetown : Govt. Printer, 1951-

   4 v. ; 25 cm.

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