Text ( visual ) : unmediated Controversy in Victorian geology : the Cambrian-Silurian dispute / James A. Secord. -- : pbk. -- Princeton, N.J. : Princeton University Press , c1986. -- xvii, 363 p. : ill. ; 25 cm. -- Bibliography: p. [321]-347 ; Includes index. -- ISBN 0691084173 ; 0691024413 ; (BA07658087) ; https://ci.nii.ac.jp/ncid/BA07658087 Author Heading(s): Secord, James A.. -- Classification(s): LCC : QE656 ; DC19 : 551.7/23 ; NDC8 : 456.3. -- Subject Heading(s): LCSH : Geology, Stratigraphic -- Cambrian -- History ; LCSH : Geology, Stratigraphic -- Silurian -- History ; LCSH : Geology -- Wales -- History