Advanced Search Tips

Year: the 'Year' field has additional flexibility provided for it. It supports the following search types:

• Single year: enter a specific year, e.g. "2010".
• Range of years: enter two years, with a hyphen ("-") in between, e.g. "2005-2010".
• "Before" or "After" years: enter a year, preceeded by a "<" (before) or ">" (after), e.g. ">2005" will return references published after 2005.
• "Before" or "After", inclusive years: enter a year, preceeded by a "<=" (before, inclusive) or ">=" (after, inclusive), e.g. ">=2005" will return references published in 2005 and after.