Oxford University Cave Club

Cave Research Group publication 14

1961 Oxford University Expedition to Northern Spain

1961 Expedition Report (CRG 14) Figures

1961 Expedition Report (CRG 14)

Other Expedition reports

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Plate 4:

Resistivity surveying with the Nash and Thompson Geophysical Tellohm Soil Resistance Meter and probe  selection box, showing reel frame (1/25 sec, f11).

John Wilcock in check shirt.