SUBROUTINE LGNDR(PLM,MPLUS,LPLUS,THET)
      DIMENSION PLM(459)
      THETA=THET /57.295779
      Y=COS(THETA)
      Z=SIN(THETA)
      IX=0
      DO 100 M=1,MPLUS
      LX=M-1
      L2=0
      P3=1.0
      FL1=LX
      IF(LX.EQ.0) GO TO 41
      DO 40 LT=1,LX
      FL1=FL1+1.0
      P3=P3*FL1*Z/2.0
   40 CONTINUE
   41 P2=0.0
      FL2=FL1+1.0
      FL3=1.0
      DO 90 LT=1,LPLUS
      IX1=IX+LT
      IF(L2-LX)50,70,60
   50 PLM(IX1)=0.0
      GO TO 75
   60 P3=(FL2*Y*P2-FL1*P1)/FL3
      FL1=FL1+1.0
      FL2=FL2+2.0
      FL3=FL3+1.0
   70 PLM(IX1)=P3
      P1=P2
      P2=P3
   75 L2=L2+1
   90 CONTINUE
      IX=IX+LPLUS
  100 CONTINUE
      RETURN
      END