Report of the geological department for the year 1957[-63-64.]
Geological Survey Department, afterwards Geological Department, afterwards Geological Survey Division (Sierra Leone)
Freetown, 
1959-[1965]
Continued by: Report on the geological survey division for the period 1st April, 1964 to 31st March, 1965 [etc.]
Continues: Annual report of the geological survey department for the year 1948[-1956.]