Lundgren, Earl F., author
Confield, 1974
Buku Teks
Porter, Donald E., author
International , 1964
Buku Teks
Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1945
Buku Teks
by James L. Riggs ... [et al.]
McGraw-Hill, 1979
Buku Teks
by Lawrence L. Bethel ... [et al.]
McGraw-Hill, 1962
Buku Teks