This file is generated by troggle using the form documented at the form documented at handbook/survey/caveentry.html
True False Gellerofen 1623 1/T(W) + 3 1623-3

Oldest documentation is dated 1880.
Höhlenforschervereinigung Altaussee, 1937
Sektion Ausseerland, 1968

Plan at 1:100 by Alfred Auer, 1968 13.1m 3.04m