Peterson, Aldor C., author
Applied engineering mechanics : strength of materials
Allyn and Bacon, 1981
 Buku Teks
The Encyclopedia Americana : volume 8
Americana Corporation, 1977
 Buku Referensi
The Encyclopedia Americana : volume 8
Americana Corporation, 1964
 Buku Referensi
Encyclopaedia Britannica : volume 8
Encyclopaedia Britannica Inc., 1967
 Buku Referensi
Encyclopaedia Britannica : volume 8
Encyclopaedia Britannica Inc., 1968
 Buku Referensi
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