Journals
Plant Systematics and Evolution Springer Science+Business Media
PLoS ONE Public Library of Science, San Francisco, California, USA
Preslia Czech Botanical Society
Proceedings and transactions of the Royal Society of Canada Royal Society of Canada, Ottawa, Canada
Proceedings and transactions of the Royal Society of Canada, Ser. 2 Royal Society of Canada, Ottawa, Canada
Proceedings of the Linnean Society of New South Wales Linnean Society of New South Wales
Proceedings of the Royal Physical Society of Edinburgh Royal Physical Society of Edinburgh, Edinburgh
Proceedings of the Royal Society of London Royal Society (Great Britain), London
Proceedings of the Royal Society of London. Series B. Biological Sciences Royal Society, London
Professional Papers of Stratigraphy and Palaeontology Geological Publishing House, Beijing, China
Professional Papers, United States Geological Survey U.S. Geological Survey, Washington, D.C.
Publicación Electrónica de la Asociación Paleontológica Argentina Asociación Paleontológica Argentina, Buenos Aires
Publication, Geological Survey of Queensland Geological Survey of Queensland, Brisbane
Publication, Societé gélogique du Nord Publication, Societé gélogique du Nord
Publications du Service géologique du Luxembourg Service géologique du Luxembourg, Luxembourg
Quarterly Journal of the Geological Society of London Geological Society of London
Report of the United States Geological Survey of the Territories Goverment Printing Office, Washington
Review of Palaeobotany and Palynology Elsevier
Revista del Museo Argentino de Ciencias Naturales Museo Argentino de Ciencias Naturales
Revista Española de Micropaleontología Instituto Geológico y Minero de España, Madrid