00373nam a22001337a 450000500170000000800410001704100080005810000200006624500590008625000130014526000560015830000100021465000150022420260924230713.0251129b        |||||||| |||| 00| 0 eng d  aeng  aLanger, Susanne  aAn Introduction to Symbolic logic /cSusanne K. Langer  a1st ed..  aLondon :bLondon  George Allen & Unwin Ltd.,c1937.  a363p.  aPhilosophy