Eastern Massif, Picos de Europa, Northern Spain
Birmingham University trip, including La Hermida (1974)
NCC exploration of “NCC Series“
including trip to Cueva de la Marniosa
brief trip to La Mesa
Speleo-Club Alpin Languedocien
1982 visit by ULSA / RRCPC
Australian Caver No 112 (1987) by Carey Barlow