Melvin E. Conway, Thomas C. Salander and Harlan M. Stenn
ANS MUMPS programmers' reference manual
Second revision
MUMPS Users' Group, College Park MD (1985)
David D. Sherertz and Ruth E. Dayhoff
ANS MUMPS programmers' reference manual 1983
Revision of the MUMPS programmers' reference manual
MUMPS Users' Group, College Park MD (1983)