'Part of the "Celebrate the Century" series, the stamp seen <a href="http://www.j-archive.com/media/2004-10-21_DJ_14.jpg" target="_blank">here</a> honored the first observance of this in the 1970s'
Earth Day
U.S. STAMPS: Part of the Celebrate the Century series, the stamp seen here honored the first observance of this in the 1970s
Part of the "Celebrate the Century" series, the stamp seen here honored the first observance of this in the 1970s
Part of the "Celebrate the Century" series, the stamp seen here honored the first observance of this in the 1970s
U.S. STAMPS
Earth Day
U.S. STAMPS