Perhaps you should try some spelling variations:
international friction » international aviation, international action, international edition
international rican » international african, international rice, international american
friction economics » action economics, production economics, irrigation economics
rican economics » can economics, american economics, african economies

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( international rican economics series ) or ( international friction economics series ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( international rican economics series ) OR ( international friction economics series )).
• Adding a wildcard symbol may retrieve word variants: (( international rican economics series ) or ( international friction economics series ))*.