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Pablo Valencia has written 7 work(s)
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Hardcover:

9780395472408 | 4th edition (Houghton Mifflin College Div, November 1, 1991), cover price $62.95

cover image for 9780395369500

Hardcover:

9780395369500 | 3 edition (Houghton Mifflin College Div, November 1, 1989), cover price $66.95

cover image for 9780395345085

Paperback:

9780395345085 | Houghton Mifflin School, January 1, 1985, cover price $17.96 | also contains Jonas Salk: A Life

displaying 1 to 7 | at end