99 Bottles of Beer on the Wall 
Limbo version.
http://99-bottles-of-beer.ls-la.net/l.html#LimboProgramming in Limbo
In BYTE Magazine, sec. Core Technologies.
http://www.byte.com/art/9710/sec4/art5.htm
A Descent into Limbo
Article by Brian W. Kernighan.
http://www.vitanuova.com/inferno/papers/descent.html
Limbo 2.0 SDK References
Language basics, programming guide and language definition.
http://agni.csa.iisc.ernet.in/OperatingSystems/Inferno/Limbo_Ref20/
Limbo Manual
Language definition (January 1997).
http://www.cs.rit.edu/~ats/inferno/limbo/
Limbo Programming Language
Growing article, with links to many related topics. Wikipedia.
http://en.wikipedia.org/wiki/Limbo_(programming_language)
