Published in Bulletin of The British Museum (Natural History) Geology, in 1950, in volume 1, pages 69-89

Created: 2013-03-01, modified: 2013-03-01

Published in Bulletin of the British Museum (Natural History). Geology., in 1950, in volume 1, issue 3, pages 49-90

Created: 2013-03-01, modified: 2021-05-13

Published in Bulletin of the British Museum (Natural History). Geology., in 1950, in volume 1, issue 4, pages 93-146

Created: 2013-03-01, modified: 2021-05-13