TY  - BOOK
AU  - Valkenburg,M.E.Van
TI  - Network analysis
SN  - 8120301560 (paperback)
PY  - 1974///
CY  - [S.l.]
PB  - TBS
UR  - http://www.amazon.com/exec/obidos/ASIN/8120301560/chopaconline-20
ER  -