Wilson, V., et al., 1934.:MareMagnumA synopsis of the Jurassic rocks of Yorkshire. With a report of the Summer Field Meeting to North-East Yorkshire, August 9th to 20th, 1934.
Worsley, D., et al., 1983.:MareMagnumThe Silurian succession of the Oslo region.8vo. Pp. 57, 21 illus. in text, refs. Orig. stiff wrs.Aquila Natural History Books · Lochem, NL9,00 €