Mayer, John Robert, author
The urban transportation problem
Massachusetts Harvard University Press , 1965
 Buku Teks
The nationalities problem and Soviet administration
selected, edited and introduced by Rudolf Schlesinger ; translated by W.W. Gottlieb
Routledge & Kegan Paul , 1956
 Buku Teks
Environment and Americans : the problem of priorities
Holt, Rinehart and Winston, 1972
 Buku Teks
Dayton, C. Mitchell, author
Statistics for problem solving
McGraw-Hill, 1971
 Buku Teks
Lee, David, author
The problem of sociology: an introduction to the discipline
Routledge, 1995
 Buku Teks
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