Frederick D.S. Marshall
Programming Hooks 105: Intermediate Output Transforms
5, Volume 5, Issue 1
ISSN 1060 7684
Michael K. Michalicek
Tutorial
KB_SQL, Intermediate SQL
5, Volume 5, Issue 2
ISSN 1060 7684
Richard F. Walters
The ABCs of MUMPS
An introduction for novice and intermediate programmers
Digital Press, Bedford MA (1989)
ISBN 1 55558 017 3
ISBN 0 13 000597 5