+C...Interface to PDFLIB.
+ COMMON/LW50512/QCDL4,QCDL5
+ SAVE /LW50512/
+ DOUBLE PRECISION QCDL4,QCDL5
+ COMMON/LW50513/XMIN,XMAX,Q2MIN,Q2MAX
+ SAVE /LW50513/
+ DOUBLE PRECISION XMIN,XMAX,Q2MIN,Q2MAX
+C...
+ COMMON/PYDAT1/MSTU(200),PARU(200),MSTJ(200),PARJ(200)