TY  - BOOK
AU  - Lyons,Mark S
TI  - Interpretation of planar structure in drill-hole core
PY  - 1964///
CY  - Boulder, Colorado
PB  - The Geological Society of America
KW  - Geology, Structural
KW  - Borings
N1  - Transparencies of graphs and base grid in pocket; Bibliography: p. 25
ER  -