Introduction to the theory of equations. Lois Wilfred Griffiths. Griffiths, Lois Wilfred, 1899-1981. Equations, Theory of. Determinants. QA211 .G7 1947 512.21 GRI "Copyright, 1945 ... under the title: Determinants and systems of linear equations." Bibliography: p. 267. New York : J. Wiley, c1947. c1947. 1947 Text ix, 278 p. eng