This is a Comment Edition of Historical Note No. 53 prepared by a summer employee of the NASA Historical Staff (APPH). The author has agreed to integrate comments and corrections submitted by critical readers, a normal process of validation for all historical reports and studies.
Abstract to "A thesis submitted to the faculty of Purdue University fo Gary Marshall Richetto in partial fulfillment of the requirements for the degree of Doctor of Philosophy, January 1969".; Handwritten note on front page: Return to Internal Communication, Room 223, 4202.