Academic Search Premier is an excellent database for demonstrating the capabilities of Boolean Operators.
The Search History feature is an invaluable tool that organizes your searches and creates complex strings of Boolean Operators. Many databases (including Summon) can act unpredictably when using complex strings of Boolean Operators, although they are great for locating sources on the web using Google.
To use this Boolean string to better effect in Summon, change the lowercase "or" to OR as Summon requires capitalization.
