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Dr. Charles Paul Alexander
Published in Journal of The New York Entomological Society, in 1979, in volume 87, issue 3, pages 186-188
Created: 2017-01-10, modified: 2017-01-10
The British Silurian cystoids
Published in Bulletin of the British Museum (Natural History). Geology., in 1967, in volume 13, issue 6, pages 297-355
Created: 2013-03-01, modified: 2021-05-13