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100 1 |a Kummer, Hans  |4 aut 
245 1 0 |a Sources of productive questions  |b experiences of a primatologist  |c Hans Kummer 
773 0 8 |i In  |t Quo vadis, behavioural biology? : past, present, and future of an evolving science ; international symposium of the Humboldt-Universität zu Berlin and the German National Academy of Sciences Leopoldina, Berlin, April 30 to May 4, 2009 ; with 2 tables.(2013)  |d 2013  |w a0068614  |g S. 157 - 168 
099 1 |a 20180928