TY  - BOOK
ED  - United States
TI  - Facing tomorrow’s challenges: U. S. Geological Survey science in the decade 2007-2017 
T2  - U. S. G. S. : science for a changing world
U1  - 550.72073 22nd ed.
PY  - 2007///].
CY  - [Reston, Virginia]: 
PB  - [U. S. Geological Survey], 
KW  - Earth sciences
KW  - Research
KW  - United States
KW  - Environmental sciences
N1  - Includes bibliographical references (p. 63-66)
ER  -