The Lightweight Simple Knots System, Nylon Highway June 23, 1993 2:00 am Robert Zimmerman Leave a comment
The Geology of Brown’s Depression: Predicting a Cave Discovery, Met Grotto News December 28, 1991 6:19 pm Robert Zimmerman Leave a comment
A Journey into Dreamland, Mapping in McFails Cave, The Northeastern Caver September 28, 1991 6:02 pm Robert Zimmerman Leave a comment
A Short Stroll to Asia Dome, Exploration/Mapping in McFails Cave, The Northeastern Caver March 28, 1991 6:20 pm Robert Zimmerman Leave a comment
A Course in Caving Single Rope Techniques, Met Grotto News December 28, 1989 6:22 pm Robert Zimmerman Leave a comment
Beyond The End, Exploration/Mapping in McFails Cave, The Northeastern Caver October 28, 1989 6:24 pm Robert Zimmerman Leave a comment
Kingston Delaware Mine, Survey and Map, Met Grotto News May 28, 1989 6:25 pm Robert Zimmerman Leave a comment
Discovery and Mapping of Here Today Cave, Part 2 Met Grotto News July 28, 1986 6:32 pm Robert Zimmerman Leave a comment
Discovery and Mapping of Here Today Cave, Part 1, Met Grotto News May 28, 1986 6:30 pm Robert Zimmerman Leave a comment
