Iowa State University Veterinarian Records, RS 22/6/0/9, University Archives, Special Collections Department, Iowa State University, http://www.add.lib.iastate.edu/spcl/arch/rgrp/22-6-0-9.html
One of the purposes of this article is to give the reader a more thorough understanding of some of the properties and uses of penicillin. However, before proceeding further it might be wise to devote a few paragraphs to the terminology used in connection with this antibacterial substance and then give a few of its physical and chemical characteristics.
Austin, V. H.
Iowa State University Veterinarian: Vol. 7
, Article 4.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol7/iss3/4