-PRINTER=Pdp
-TBL= dtbl -${PRINTER}
-TROFF= ditroff -${PRINTER}
-LPR= lpr -n -${PRINTER}
-
-paper: intro.${PRINTER} tutor.${PRINTER} paper.${PRINTER}
-paper: apndx1.${PRINTER} apndx2.${PRINTER} apndx3.${PRINTER}
- ${LPR} intro.${PRINTER}
- ${LPR} tutor.${PRINTER}
- ${LPR} paper.${PRINTER}
- ${LPR} apndx1.${PRINTER}
- ${LPR} apndx2.${PRINTER}
- ${LPR} apndx3.${PRINTER}
+
+paper.${PRINTER}: intro.${PRINTER} tutor.${PRINTER} apndx1.${PRINTER} \
+ apndx2.${PRINTER} apndx3.${PRINTER}
+ ${TBL} ${PAPER} | ${ROFF} > ${.TARGET}