"Mousses Amérique du Nord." . . "Torfmoos (Gattung)" . . "Geschichte 1896." . . "Systematik." . . "Habitat." . . "Morphologie (Biologie)" . . "Identificatie (algemeen)" . . "Mossen." . . "North America." . . "Mosses." . . . . . . . . . . . . . "Analytic Keys to the Genera and Species of North American Mosses"@en . . "Analytic keys to the genera and species of North American mosses"@en . . . "Analytic keys to the genera and species of North American mosses" . . . "Analytic keys to the genera and species of north american mosses"@en . "Analytic keys to the genera and species of north american mosses" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Analytic keys to the genera and species of North American mosses, by Charles Reid Barnes, revised and extended by Fred. de Forest Heald" . . "Analytic keys to the genera and species of North American Mosses" . . . . . . . . . . "Klaffmoose." . . "Pflanzenname." . . "Verbreitung." . . . . "Laubmoose." . . "Mosses North America." . . "Nordamerika." . . "Bryofyten." . . "Musci" . .