THE ORDOVICIAN ROCKS OF THE COUNTRY BETWEEN DWYGYFYLCHI AND DOLGARROG, CAERNARVONSHIRE.STEVENSON IP.1971; PROC. YORKSHIRE GEOL. SOC.; GBR; 1971,1972, VOL. 38, NUM. 0004, P. 517 A 548Miscellaneous

POTASSIUM-ARGON AGE DETERMINATION OF THE WATERSWALLOWS SILL, BUXTON, DERBYSHIRE.STEVENSON IP; HARRISON RK; SNELLING NJ et al.1970; PROC. YORKSHIRE GEOL. SOC.; GBR; 1970, VOL. 37, NUM. 004 , P. 445 A 447Miscellaneous

AN UNUSUAL GLAUCONITE ASSOCIATED WITH HYDROCARBON IN REEF-LIMESTONES NEAR CASTLETON, DERBYSHIRE AND DISCUSSION.YOUNG BR; HARRISON RK; SERGEANT GA et al.1968; PROC. YORKSHIRE GEOL. SOC.; GBR; 1968, VOL. 36, NUM. 0023-004 , P. 417 A 434Miscellaneous

EXCURSION 3: THE PENNINES OF NORTHERN ENGLAND.FRANCIS EH; STEVENSON IP; WOLFENDEN EB et al.1971; IN : 6 CONGR. INT. STRATIGR. GEOL. CARBONIFERE, IV, SHEFFIELD, 1967.; 1971, P. 1699 A 1723Miscellaneous

GEOLOGY OF THE COUNTRY AROUND CHAPEL EN LE FRITH. (EXPLANATION OF ONE-INCH GEOLOGICAL SHEET 99, NEW SERIES).STEVENSON IP; GAUNT GD; MITCHELL M et al.sd1971, P. 1 A 444Miscellaneous