[editor, Helen Savage ; associate editor, Richard A. Sherwood ; production associate, Phyllis Spinelli]
Gale Research
1974
Class B, pt. 1 , Class D , Class K, subclass KF , Class L , Class P, subclass PG , Class P, subclass PN, PR, PS, PZ , Class P, subclass PQ, pt. 1 , Class Q : science
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