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to Matienzo Caves
Available now is a pdf containing all the logbook entries (1981 - 1991) about explorations in the Trident Passages, Cueva Hoyuca. This will help all those who may be (re-)exploring, pushing and (re-)surveying in here this summer and beyond. (There is also a link to the file below the "References" section on the Hoyuca description page.) http://matienzocaves.org.uk/history/0107-Trident/Trident%20Passages%20Explorations%201981%20-%201991.pdf