National Speleological Society
Recommended Caving Gear (Mother Lode Grotto)
Area Geology
William (Bill) Hirt – Cascade/Klamath Area
USGS Field Trip Guides
Medicine Lake Geologic Map
USFS Pubs
![](https://sag.caves.org/wp-content/uploads/2022/12/skull-Cave.jpg)
Surveying
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NSS Pub: A Guide to Cave Mapping