TY  - BOOK
AU  - Berry, William B. N.
AU  - Boucot, A. J. (Arthur James)
TI  - Correlation of the South American Silurian rocks
PB  - Geological Society of America
PY  - 1972
T2  - Special paper / Geological Society of America
VL  - no. 133
EP  - [xi], 59 p.
UR  - http://ci.nii.ac.jp/ncid/BA54949802
SN  - 0813721334
ER  -