TY  - BOOK
ED  - H. John Heinz III Center for Science, Economics, and the Environment
TI  - The state of the nation's ecosystems: measuring the lands, waters, and living resources of the United States 
SN  - 0521525721
U1  - 333.72 
PY  - 2002///
CY  - Cambridge (Reino Unido), New York (EE.UU.)
PB  - Cambridge University Press
KW  - Vigilancia ambiental
KW  - Estados Unidos
KW  - Metodología
KW  - Ecosistemas
KW  - Estado
N1  - Incluye referencias bibliográficas; Pt. I; The State of the Nation's Ecosystems: Philosophy, Framework, and Findings --; Ch. 1; Reporting on the State of the Nation's Ecosystems --; Ch. 2; The Reporting Framework --; Ch. 3; The State of the Nation's Ecosystems: What We Know and What We Don't Know --; Pt. II; The Indicators --; Ch. 4; Core National Indicators --; Ch. 5; Coasts and Oceans --; Ch. 6; Farmlands --; Ch. 7; Forests --; Ch. 8; Fresh Waters --; Ch. 9; Grasslands and Shrublands --; Ch. 10; Urban and Suburban Lands
ER  -