Unwin Hyman ISBN 0-04-561001-0* Centre for Palynology, University of Sheffield, UK* The Micropalaeontological Society, Palynology Group* The American Association of Stratigraphic Palynologists (AASP)* Commission Internationale de Microflore du Paléozoique (CIMP), international commission for Palaeozoic palynology.
Unwin Hyman ISBN 0-04-561001-0== External links ==* Centre for Palynology, University of Sheffield, UK* The Micropalaeontological Society, Palynology Group* The American Association of Stratigraphic Palynologists (AASP)* Commission Internationale de Microflore du Paléozoique (CIMP), international commission for Palaeozoic palynology.