Earth Day poster by Bob Masse, signed Linda Bonner 6 years ago This is a poster published in 2000 to celebrate the 30th anniversary of Earth Day. Artist: Bob Masse. This copy is signed by him. Measures 63cm x 34cm RelatedEaster Be-in poster Bob MasseJuly 16, 2018Similar postTori Amos poster signed by Bob MasseJuly 16, 2018Similar post'David Bowie' tribute poster by Bob MasseNovember 30, 2016Similar post