Classified chinese communist documents
Institute of International Relations, National Chengchi University, 1978
Buku Teks
Readings learning and human abilities
Harper,
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Little, Charles E.
Cyclopedia of classified dates: with an exhaustive index
Gale Research Company, 1967
Buku Referensi
Fienberg, Stephen E.
The analysis of cross-classified categorical data
Massachusett Institute of Technology, 1980
Buku Teks
Korean Characters
Buku Teks