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)

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Plate 5:

Plane-table surface surveying in connection with resistivity surveying, at Las Reblagas (1/125 sec, f11).

John Crompton (standing facing),
Ian Gordon (bending over plane table)