References
Footnotes
- Butt , J. ‘Technical Change and the Growth of the British Shale Oil Industry (1680–1870)’ . Economic History Review , XVII 511 – 521 . 2nd ser.
- Redwood , I. I. 1897 . Mineral Oils and Their By-Products 6 – 6 . London
- Nielsen , A. W. ‘Parafinfabrikken Pa Riisoebank 1 1860 Arene’ , Lindesnes, 21 June 1940
- Nielsen , A. W. 1941 . Mandals Sjofarts-Historie fra 1850 26 – 26 . Oslo
- Wikborg , T. 1954 . O. Wikborg , : 13 – 17 .
- Worm-Miiller , J. S. 1950 . Den Norske Sjofarts Historie Vol. II , 225 – 225 . Oslo