Scope and Contents The North Dakota Division of Independent Study Records is an eclectic assortment of documents from the early years of the division, spanning from the early 1940s into the late 1970s. The major component of the collection related to the writing and publishing of the textbook Basic Mathematics for High School; the Study of Measurement, written by T.W. Thordarson and R. Perry Anderson in 1959 by Allyn and Bacon. Other records include correspondence of T.W. Thordarson to the North Dakota State...