COMPASS is a cave mapping software package designed to edit, process, analyze and view cave survey data using an IBM PC compatible computer. quantity surveying take off software

Tennessee Cave Survey is an Internal Organization of the National Speleological Society who are devoted to the exploration and scientific study of caves,

A database devoted to the recording of underground sites with associated data.

The Texas Speleological Survey (TSS) founded in 1961, retains records from known caves and karst features in Texas

Story of the blood sucking vampire bats by Adrian Warren, wildlife producer for the film "Vampire" for BBC