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Catalogue of the Hepaticae and Anthocerotae of Sub-Saharan Africa
by Martin J. Wigginton & Riclef Grolle ; ...
Bok Engelsk 1996
The Hepaticae and Anthocerotae of the East African Islands : an Annotated Catalogue
by Riclef Grolle
Bok Engelsk 1995
Annotated catalogue of Western Melanesian bryophytes. 1 : Hepaticae and Anthocerotae
Riclef Grolle and Sinikka Piippo
Bok Engelsk 1984
Nomina generica Hepaticarum : references, types and synonymies
Riclef Grolle
Bok Engelsk 1983