. Bulletin de la Société fribourgeoise des sciences naturelles : compte-rendu. Natural history; Science. BULLETIN DE LA SOCIÉTÉ FRIBOURGEOISE DES SCIENCES NATURELLES COMPTE-RENDU 1911-1912 VOL. XX Avec 2 graphiques et 1 ^ZÜ4-Z8 FRIBOURG IMPRIMERIE FRAGNIÈRE FRÈRES. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Société fribourgeoise des sciences naturelles. Fribourg : Imprimerie Ant. Henseler

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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience