Perhaps you should try some spelling variations:
"europe public research unit series." » "europe public resource unit series.", "europe public resources unit series.", "europe pacific research unit series.", "european public research unit series.", "europe public research united series."
"european policy research union series." » "european politics research union series.", "european policy research upon series.", "european policy research united series.", "european policy research using series.", "european policy research action series.", "european policy research london series.", "european policy research wien series."

Try widening your search to All Fields.

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