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Up To €10 (0) € 10 Tot € 20 (0) € 20 Tot € 50 (2) € 50 En Meer (0)

Putnam, David (2) Johnson, David (2) Johnson, Maureen (2) David Johnson, Eskor (1) Cutnell, John D. (southern Illinois University At Carbondale), Johnson, Kenneth W. (southern Illinois University At Carbondale), Young, David (louisiana State University), Stadler, Shane (louisiana State University) (1)

2021 (1) 2014 (1)

Overig (2)