One of the listings in issue 72's Atari P/M graphics article contained an error. Line 10100 should read:

10100 P1PL=53260:P2PL=53261:
      P3PL=53262:P4PL=53263:
      POS1=53248:POS2=53249:
      POS3=53250:POS4=53251:
      WHERE=A+8:RETURN