Published in Bulletin of The British Museum (Natural History) Geology, in 1991, in volume 46, pages 175-270

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 46, issue 2, pages 153-174

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 1, pages 1-33

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 1, pages 35-50

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 1, pages 51-100

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 2, pages 101-152

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 2, pages 153-168

Published in Bulletin of the British Museum (Natural History). Geology., in 1991, in volume 47, issue 2, pages 169-175