TY  - BOOK
AU  - Lefschetz Solomon
TI  - Applications of algebraic topology : graphs and networks-the Picard Lefschetz theory and Feynman integrals
U1  - 514.2 
PY  - 1975///
CY  - N Y
PB  - Springer-Verlag
KW  - Algebraic-topology
ER  -