National Speleological Society. Cave Geology and Geography Section. Cave geology. published in cooperation with the Section of Cave Geology and Geography, National Speleological Society.
Chicago-Zitierstil (17. Ausg.)National Speleological Society. Cave Geology and Geography Section. Cave Geology. State College, Pa.: published in cooperation with the Section of Cave Geology and Geography, National Speleological Society.
MLA-Zitierstil (8. Ausg.)National Speleological Society. Cave Geology and Geography Section. Cave Geology. published in cooperation with the Section of Cave Geology and Geography, National Speleological Society.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.