Example Search:

Let’s search the Little Colorado River watershed for work completed since 1950. 
Going to the AZGeoBib search engine:
            Select datepub  > 1950
            Select watershed contains Little Colorado River

           
Results: Nearly 350 citations are found with this query.  Too many!

Revisit the search and confine your time of interest to mid-1990s and later.
            Select datepub  > 1995
            Select watershed contains Little Colorado River

Results:  A managable 51 records are found. 

However, maybe you are only interested in the Coconino County portion of the Little Colorado River.  Let’s redo the search.

            Select datepub  > 1995
            Select County contains cn  (cn is the correct abbreviation for Coconino County).
            Select watershed contains Little Colorado River

This search render a mere seven references.  But given the search parameters, they may be exactly what you are looking for.

Last, if you encounter quirks, problems, or errors, or you simply cannot achieve a reasonable result, please let us know.  We’ll do whatever we can to help.

Happy Hunting!