TY  - BOOK
AU  - Hansen,Wallace R.
TI  - The Black Canyon of the Gunnison,: today and yesterday,
AV  - QE75 .B9 no. 1191
PY  - 1965///]
CY  - [Washington
PB  - For Sale by the Superintendent of Documents, U. S. Govt. Print. Off.
KW  - Geology
KW  - Colorado
KW  - Black Canyon
N1  - Bibliography: p. 75-76
ER  -