Alan Cressler:
7th Unnamed Cave, White County, Tennessee, Alan Cressler 1
Alan Cressler:
19 Foot Pit, We Dug Open, West Side Walden Ridge, Sequatchie Valley, Bledsoe County, Tennessee, Marion O. Smith, Gerald Moni, Avis Moni 1
Alan Cressler:
19th Unnamed Cave, Jackson County, Alabama, Elliot Stahl 1
Alan Cressler:
19th Unnamed Cave, Jackson County, Alabama, Matt Kalch 1
Alan Cressler:
60th Unnamed Cave, Dogs Panel, Precision Survey, Leica HDS 6000 Phase Based Laser System, Left to Right, Donald Stolpmann, Scott Carter, Shane Loyd, Jan Simek 1
Alan Cressler:
60th Unnamed Cave, Dogs Panel, Precision Survey, Leica HDS 6000 Phase Based Laser System, Scott Carter and Shane Loyd 1
Alan Cressler:
60th Unnamed Cave, Recording Prehistoric Cave Art, Tennessee, Jan Simek and Donald Stolpmann 1
Alan Cressler:
62nd Unnamed Cave, Grundy County, Tennessee, L to R, Joe Douglas, Brian Roebuck, Lynn Roebuck 1
Alan Cressler:
65th Unnamed Cave, Prehistoric Pictographs, Panel 1, Monolithic Axe, Tennessee, Gerald Moni 1
Alan Cressler:
2009 USGS ARMI (Amphibian Research and Monitoring Initiative) meeting, Twin Creeks Natural Resource Center, Great Smoky Mountains National Park, Sevier County, Tennessee 1
Alan Cressler:
2015 S.E.R.A. Cave Carnival, East Fork Stables, Fentress County, Tennessee, Nancy Aulenbach, Allen Mosler, Jeff Moore, Paul Aughey 1
Alan Cressler:
Aaron Goldtooth, Jonathan Bailey, and Alan Cressler, The Narrows, Grand Wash, Capitol Reef National Park, Wayne County, Utah 1
Alan Cressler:
accident, hopeful, georgia, photo by andy hickey 1
Alan Cressler:
accident, hopeful, georgia, photo by andy hickey 2
Alan Cressler:
accident, hopeful, georgia, photo by andy hickey 3
Alan Cressler:
Adrian Castillo, U.S. Geological Survey, Custom Remote Control Boat, Acoustic Doppler Current Profiler (ADCP), Hydro 3, Discharge Measurement, St. Lucie Canal below S-308, near Port Mayaca, Martin County, Florida 1
Alan Cressler:
Agathis australis, old growth, Trounson Kauri Walk, Trounson Kauri Park Scenic Reserve, Kaipara District, Northland, New Zealand, Alan Cressler 1
Alan Cressler:
Agathis australis, old growth, Trounson Kauri Walk, Trounson Kauri Park Scenic Reserve, Kaipara District, Northland, New Zealand, Paul Aughey 1
Alan Cressler:
Agathis australis, Rakaunui, Omahuta Kauri Sanctuary, Omahuta Forest Sanctuary, Far North District, Northland, New Zealand, Paul Aughey and Brian Killingbeck 1
Alan Cressler:
Agathis australis, Tane Mahuta, Waipoua Forest Sanctuary, Kaipara District, Northland, New Zealand, Paul Aughey 2
Alan Cressler:
Agathis australis, Te Matua Ngahere, Waipoua Forest Sanctuary, Kaipara District, Northland, New Zealand, Paul Aughey 1
Alan Cressler:
Agathis australis, Whatamakere (fallen), Omahuta Kauri Sanctuary, Omahuta Forest Sanctuary, Far North District, Northland, New Zealand, Paul Aughey 1
Alan Cressler:
A Group of Cavers About to Enter Grassy Cove Saltpeter Cave, Cumberland County, Tennessee 1
Alan Cressler:
Akahu Kaimu, Anchialine Pool, North Kona District, Hawaii County, Hawaii, Alan Cressler 1
Alan Cressler:
Alan Cressler's, Badly Broken Arm 1
Alan Cressler:
Alan Cressler's, Carpal Tunnel Surgery 1
Alan Cressler:
Alan Cressler's, Carpal Tunnel Surgery 2
Alan Cressler:
Alan Cressler's, Cool Fixed Arm 1
Alan Cressler:
Alan Cressler's, CRITA Award, Photo by Jay Franklin
Alan Cressler:
Alan Cressler's, Fern Book Collection 1
