TY  - BOOK
AU  - Bailey,Robert G.
ED  - United States.
ED  - U.S. Dept. of Agriculture,
TI  - Description of the ecoregions of the United States
U1  - 577.0973 23
PY  - 1978///
CY  - Washington
PB  - U.S. Dept. of Agriculture
KW  - Ecology
KW  - United States
KW  - Ecological regions
KW  - Biotic communities
N1  - Includes bibliographical references
ER  -