Probably I am preaching to the choir, but I want to draw the attention of
anybody unfamilar with the Internet abstracting and citation services, etc.
  In order to pay expenses publishers who in the past relied on
subscriptions to print works now restrict Internet access to their services
to libraries which pay a subscription.  Probably most of us can get into
the web sites of such libraries.  For instance, my own institutional
libraruy offers access to America: History and Life and Historical
Abstracts (both published by ABC-Clio), as well as ARts and Humanities
Citation Index, Humanities Abstracts, etc.   My university library also
provides access to WorldCat (provided by OCLC).  Some services can be
accessed directly through the web without an intervening subscribing
library (such as Northern Light).  (By the way, easy access to Northern
Light and much much more is available through Scholars' Guide to WWW,
updated monthly by Richard Jensen.)  Such Internet services make it less
important to be within easy travel distance of a major research library
than in my student days.