BELL, CLIFFORD.
Essentials of plane and spherical trigonometry, by Clifford Bell & Tracy Y. Thomas.
BELL, CLIFFORD. Essentials of plane and spherical trigonometry, by Clifford Bell & Tracy Y. Thomas. © 30Apr43; A173989. Holt, Rinehart & Winston, Inc. (PWH); 8Oct70; R492620.
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