Catasto Speleologico Ligure
Val Bormida 
Magazine: Liguria Guide 17
Authors: PICCO M., MEIRANA G.
Year: 1997
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La grotta, il sogno e il grande incubo 
Magazine: Stalattiti e Stalagmiti
Authors: BAZZANO Maurizio
City: Savona
Province: SV
Year: 1997
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Orpe? No grazie 
Magazine: Stalattiti e Stalagmiti
Authors: VERRINI Alberto
City: Savona
Province: SV
Year: 1997
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