TY  - BOOK
AU  - Francis,George K.
TI  - A topological picturebook
SN  - 0387964266
U1  - 514 
PY  - 1987///
CY  - New York, Heidelberg [u.a.]
PB  - Springer
KW  - Topology
KW  - Graphic methods
UR  - http://www.gbv.de/dms/hbz/toc/ht002923004.pdf
UR  - https://zbmath.org/?q=an:0612.57001
ER  -