Foster, Philip
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Buku Teks
Wilson, Lynn, 1954-, author
Information Science Reference, 2016
Buku Teks
Rummel, J. Francis
Harper & Row, 1964
Buku Teks
Knezevich, Stephen J.
Harper & Row , 1962
Buku Teks
Angus and Robertson, 1961
Buku Teks