THEORETICAL PROBLEMS OF GEOGRAPHY
V.A.ANUCHIN,ROLAND J.FUCHS,GEORGE J.DEMKA2222 年出版331 页ISBN:0814202217
GROUNDWATER DYNAMICS PROBLEM SETS
YE WEININ,ZHAO QIAN,CHEN YONGGUI,YEBIN,XU LONG2013 年出版62 页ISBN:7560850962
LEARNING THROUGH PROBLEM SOLVING
DANIEL K.APPLE STEVEN W.BEYERLEIN MARK A.SCHLESINGER1992 年出版388 页ISBN:1878437194