TY  - BOOK
AU  - Lefschetz, S.
TI  - Applications of algebraic topology: graphs and networks the picard-lefschetz theory and feynman integrals
T2  - Applied Mathematical Sciences 16
SN  - 038790137X
U1  - 514.2 
PY  - 1975///
CY  - New York
PB  - Springer Verlag
ER  -