Peterson, Ralph
S & A Wheeler-Whitfield, 1972
Buku Teks
Merrifield, Ralph
The Pitman Pres , 1983
Buku Teks
Goin, Coleman J.
W. H. Freeman, 1971
Buku Teks
Niles, Olive S., author
Scott, Foresman And Co, 1983
Buku Teks
Garcia, Maria Jesus Lerma, author
Springer, 2012
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