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3944. Relationship of supersonic wave frequency and cellulicidal action

3945. Relationship of supersonic wave frequency and cellulicidal action (Document Number 55388A)

3946. Relationship of supersonic wave frequency and cellulicidal action (Document Number 55388B)

3947. Relationship of supersonic wave frequency and cellulicidal action (Document Number 55388C)

3949. Studies in aviation medicine (Volume 1)

3950. Studies in aviation medicine (Volume 2)