Ptéridophytes.
By: Préf. par Walter Robyns.
Series: Flore générale de Belgique.
Publisher: Jardin botanique de l'État
Published: 1950
Place of publication: Bruxelles
Language: eng
Number of pages: 194
Subjects: Pteridophyta.; Botany -- Belgium.
Notes: At head of title: Ministère de l'agriculture.