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
The improvement and development during the past 10 to 15 years of biological and pharmaceutical agents as well as surgical equipment for use in the control of livestock and poultry diseases has been most interesting and valuable. During this period we have experienced also a global war. The mobilization of manpower, specialized training of personnel and production of equipment for their use, as well as the production of food stuffs, especially of animal origin, for our population and for that of many foreign countries, may have assisted in bringing about some of the rapid strides in the medical sciences. The progress by scientists was possible, mainly, because of an opportunity of free enterprise and individual initiative. The old proverbs, "Competition is the Life of Trade" and "Necessity is the Mother of Invention" still apply, and these too may have entered into the iniative resulting in the developments that we are to consider at this time.
Scheidy, S. F.
"Recent Trend in Veterinary Therapy,"
Iowa State University Veterinarian: Vol. 12
, Article 4.
Available at: http://lib.dr.iastate.edu/iowastate_veterinarian/vol12/iss3/4