The Type, Field,and Status options are related by logical OR.
For example, to search for books that are either about
Psycholinguistics or Phonetics or both, check the
Psycholinguistics and Phonetics boxes and no others.
Similarly, to search for books that are either Available
or Out of Print, check both Status boxes. To search
for books that are only Out of Print, check the Out of
Print box and leave the Available box unchecked.