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Are you Donald F. Proctor, author of the books below?
Breathing, Speech, and Song by Donald F. Proctor The Nose, upper airway physiology and the atmospheric environ... by Donald F. Proctor A History of Breathing Physiology by Donald F. Proctor Raindance by Proctor Breathing, speaking, singing (1987) ISBN by Donald F. Proctor A History of Breathing Physiology by Donald F. Proctor The nose, paranasal sinuses and ears in childhood. 1963 [Leat... by Donald F. Proctor


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