Title: Use of punched card tabulating equipment in multiple correlation problems, collected and prepared for the use of statisticians of the Bureau
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF005403407&ix=pm&I=0&V=D&pm=1" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF005403407&ix=pm&I=0&V=D&pm=1</a>
Subjects: Punched card systems.