Excursion to Durham and the Northern Pennines

K. C. Dunham
Geological Survey of Great Britain

Mineralogical Magazine; March 1947 v. 28; no. 196; p. 45-51; DOI: 10.1180/minmag.1947.028.196.09
© 1947, The Mineralogical Society
Mineralogical Society (www.minersoc.org)