World Stamp Catalogue/United States/1970s

1970s

• 
  Edgar Lee Masters, 6¢, 1970
• 
  Save our Cities, Soil, Air, Water, 6¢, 1970
• 
  South Carolina, 6¢, 1970
• 
  LOVE Stamp, 8c, 1973, designed by Robert Indiana
• 
  Robert Frost, 10¢, 1974