THE YOUTH GANG PROBLEM:A COMMUNITY APPROACH
IRVING A.SPERGEL1995 年出版346 页ISBN：0195092035
THE WORLD'S MOST FAMOUS MATH PROBLEM
MARILYN VOS SAVANT1993 年出版80 页ISBN：0312106572
DEALING WITH THE NORTH KOREAN NUCLEAR PROBLEM
TAEWOO KIM SELIG S.HARRISON1995 年出版288 页ISBN：8946022086
AN INTRODUCTION TO THE PROBLEM OF GOVERNMENT
WESTEL W. WILLOUGHBY AND LINDSAY ROGERS1927 年出版545 页ISBN：
THE UNITED STATES-JAPAN ECONOMIC PROBLEM
C.FRED BERGSTEN AND WILLIAM R.CLINE2222 年出版170 页ISBN：0881320609
The (1+1)-Nonlinear Universe of The Parabolic Map and Combinatorics
James D. Louck ; Myron L. Stein2015 年出版180 页ISBN：9814632416
Studies In The Problem Of Sovereignty Volume 1
Harold J.Laski2015 年出版297 页ISBN：1138821781
MARTIN HEIDEGGER AND THE PROBLEM OF HISTORICAL MEANING
JEFFREY1988 年出版322 页ISBN：
