The classification of maps of surfaces
Keyword(s):
1988 ◽
Vol 11
(4)
◽
pp. 409-422
◽
1964 ◽
Vol 111
(1)
◽
pp. 138-138
◽
1986 ◽
Vol 14
(2)
◽
pp. 283-287
◽
Keyword(s):
1979 ◽
Vol 1
(2)
◽
pp. 393-399
2005 ◽
Vol 39
(6)
◽
pp. 631-642
◽