British Guiana. Geological Survey & Guyana. Geological Survey. (1968). Report on the Geological Survey Department for the year. The Dept..
Chicago Style (17th ed.) CitationBritish Guiana. Geological Survey and Guyana. Geological Survey. Report on the Geological Survey Department for the Year. Georgetown: The Dept., 1968.
ציטוט MLABritish Guiana. Geological Survey and Guyana. Geological Survey. Report on the Geological Survey Department for the Year. The Dept., 1968.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.