1
Published: 1921
Superior document: Catalogue of the fossil Bryozoa (Polyzoa) in the Department of Geology, British Museum (Natural History) The cretaceous Bryozoa (Polyzoa), 3, The Cribrimorphs, 1
2
Published: 1922
Superior document: Catalogue of the fossil Bryozoa (Polyzoa) in the Department of Geology, British Museum (Natural History) The cretaceous Bryozoa (Polyzoa), 4, The Cribrimorphs, 2