TY  - BOOK
AU  - Johnsen, Thomas N.
AU  - Elson,Jerry W.
TI  - Sixty Years ofchange ona central Arizona Grassland-Juniper Woodland Ecotone
U1  - 571.78 21st ed.
PY  - 1979///
CY  - Oakland
PB  - U.S. Department of Agriculture Science and Education Administration  
KW  - Pinyon-Juniper, Vegetation Change, Ecotone, Soil, Utah Juniper Invasion, Grazing History, Grasslands
N1  - Agricultural Reviews and Manuals. ARM-W7/April 1979
ER  -