The Secretion of Insulin: A 16mm colour film (with sound) running for 22 minutes. Available on free loan from Ely Lilly & Company, Audio-Visual Film Library, P.O. Box 814, Indianapolis, Indiana 46206, U.S.A. For loan in Great Britain, contact the Films Officer, Ely Lilly & Co. Ltd., Kingsclere Road, Basingstoke, Hants. RG21 2XA

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