@Article{gh-35-135-1980,
AUTHOR = {Portmann, J.},
TITLE = {A propos du programme de maturité fédérale en géographie},
JOURNAL = {Geographica Helvetica},
VOLUME = {35},
YEAR = {1980},
NUMBER = {3},
PAGES = {135--136},
URL = {https://gh.copernicus.org/articles/35/135/1980/},
DOI = {10.5194/gh-35-135-1980}
}