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Stephan Robbert Gradstein

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Guide to the Genera of Liverworts and Hornworts of Malaysia
Taxonomic Revision of Lejeuneaceae Subfamily Ptychanthoideae (Marchantiophyta) in China
Manual de briologia
Guide to the Liverworts and Hornworts of Java
Catálogo de plantas y líquenes de Colombia
Index Herbariorum A Guide to the Location and Contents of the World's Public Herbaria : Pt.2, Collectors