Vitus Johannes Grummann (1899–1967) Correspondence on Biographisch-bibliographisches Handbuch der Lichenologie (1974), HIBDARC-0224. Hunt Institute for Botanical Documentation Archives.
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Vitus Johannes Grummann (1899–1967) Correspondence on Biographisch-bibliographisches Handbuch der Lichenologie (1974), HIBDARC-0224. Hunt Institute for Botanical Documentation Archives. https://as.huntbot.org/repositories/2/resources/119 Accessed June 18, 2026.