Individual Keyword Searches
There are many individual searches where high percentages of the retrievals have the keywords only in a subject field:
retrieved s.h. only s.h. only
abortion teenagers 3 3 100 %
afro american children language 18 17 94 %
advertising layout typography 19 17 90 %
aeronautical instruments 70 62 88 %
abortion birth control 142 111 78 %
air pollution 2645 1620 61 %