TY  - RPRT
TI  - Twentieth century demographic changes in cirio and cardón in Baja California, Mexico
AU  - Stephen H. Bullock
AU  - Nora E. Martijena
AU  - Robert H. Webb
AU  - Raymond M. Turner
PY  - 2004
DO  - 10.1111/j.1365-2699.2004.01152.x
UR  - https://pubs.usgs.gov/publication/70029105
ID  - 70029105
ER  -