If the Library does not subscribe to a particular journal, or if the A-Z list is down, use the options belows.
Library Catalog
MIDCAT: Search the journal title first in MIDCAT, the online library catalog for call number and location.
Electronic Archives
JSTOR: a full-text archive, includes backfiles of 29 journals in the fields of ecology and plant biology; because JSTOR is an archive, the backfiles end from 2 to 5 years before the present.
Early Classics in Biogeography, Distribution, and Diversity Studies: To 1950: another archive.
Free full-text journals on the Web
Finally, if the journal you seek is not available at the College Libraries, you may request a photocopy through ILL.