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Jonas Salk was a great doctor and medical researcher.
Jonas salk biography pdf
Jonas Salk, best known as the developer of the first successful vaccine against paralytic poliomyelitis, also made many other contributions in the fields of medicine and biology, .
Jonas salk biography pdf download
Jonas Salk was an American physician and medical researcher who developed the first safe and effective vaccine for polio.
Jonas salk biography pdf free
Jonas Salk: a life / Charlotte DeCroes Jacobs.