TY  - BOOK
AU  - Donovan,D.T.
TI  - Stratigraphy; an introduction to principles,
AV  - QE651 .D6 1968
U1  - 551.7 
PY  - 1968///, c1966]
CY  - Chicago
PB  - Rand McNally
KW  - Geology, Stratigraphic
N1  - Bibliography: p. [189]-195
ER  -