SUBROUTINE XDQMU(NU1,NU2,MU1,MU2,THETA,X,SX,ID,PQA,IPQA)
C***BEGIN PROLOGUE  XDQMU
C***REFER TO  XDLEGF
C***ROUTINES CALLED  XDADD, XDADJ, XDPQNU
C***DATE WRITTEN   820728   (YYMMDD)
C***REVISION DATE  871119   (YYMMDD)
C***CATEGORY NO.  C3a2,C9
C***KEYWORDS  LEGENDRE FUNCTIONS
C***AUTHOR  SMITH, JOHN M. (NBS AND GEORGE MASON UNIVERSITY)
C***PURPOSE  TO COMPUTE THE VALUES OF LEGENDRE FUNCTIONS FOR XDLEGF.
C METHOD: FORWARD MU-WISE RECURRENCE FOR Q(MU,NU,X) FOR FIXED NU TO
C         OBTAIN  Q(MU1,NU,X),Q(MU1+1,NU,X),....,Q(MU2,NU,X)
C***REFERENCES  OLVER AND SMITH,J.COMPUT.PHYSICS,51(1983),N0.3,502-518.
C***END PROLOGUE  XDQMU