Published in Bulletin of The British Museum (Natural History) Geology, in 1989, in volume 45, pages 21-37

Published in Bulletin of the British Museum (Natural History). Geology., in 1989, in volume 45, issue 1, pages 1-20

Published in Bulletin of The British Museum (Natural History) Geology, in 1989, in volume 45, issue 1, pages 39-55

Published in Bulletin of The British Museum (Natural History) Geology, in 1989, in volume 45, issue 1, pages 57-69

Published in Bulletin of the British Museum (Natural History). Geology., in 1989, in volume 45, issue 1, pages 71-76

Published in Bulletin of The British Museum (Natural History) Geology, in 1989, in volume 45, issue 1, pages 77-163