1. Trees and shrubs of southwestern deserts;Benson,1981
2. Late Quaternary plant zonation and climate in southeastern Utah;Betancourt;Great Basin Nat.,1984
3. Paleoecology of pinyon-juniper woodlands: Summary;Betancourt,1987
4. Late Quaternary biogeography of the Colorado Plateau;Betancourt,1990
5. The use of pollen analysis in the reconstruction ofpast climates: a review;Birks,1981