Mathematics
Mathematics
LAGRANGE, (LA GRANGE), JOSEPH LOUIS. - A FUNDAMENTAL MEMOIR IN THE THEORY OF NUMBERS
Sur La Solution des Problemes ..(Berlin, Haude et Spener, 1769).
LEWIS, C.I. (CLARENCE IRVING). - "THE LOGIC OF STRICT IMPLICATIONS"
A Survey of Symbolic Logic.Berkeley, University of California Press, 1918.