TY  - RPRT
TI  - Productivity and flowering of winter ephemerals in relation to Sonoran Desert shrubs
AU  - William L. Halvorson
AU  - Duncan T. Patten
PY  - 1975
DO  - 10.2307/2424164
UR  - https://pubs.usgs.gov/publication/1007710
ID  - 1007710
ER  -