Published in Bulletin of the British Museum (Natural History) Botany, in 1989, in volume 18, issue 5, pages 323-477

Published in Bulletin of the British Museum (Natural History) Botany, in 1989, in volume 19, pages 1-3

Published in Bulletin of the British Museum (Natural History) Botany, in 1989, in volume 19, pages 5-61