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
Joan Zimmerman and Thomas C. Salander
Introduction to standard MUMPS, revised
A guide for the novice / original
MUMPS Users' Group, College Park MD (1984)