article
guidebook published in 1959
guidebook published in 1971
guidebook published in 1982
guide book first published in 1959
1997 book
guidebook published in 1965
guidebook published in 1983
guidebook published in 1963
book published in 2006
book published in 1989
book about Bernard de Gomme
book review published in 2006
guidebook published in 1993
scientific article published on January 1962
scientific article published on January 1969
scientific article published in January 1972
guidebook published in 1960