Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 1, pages 1-8

Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 1, pages 9-12

Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 1, pages 13-24

Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 2, pages 25-43

Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 2, pages 45-78