Covers tagged "Conservation" (clear filter)

Guru Amar Das / World Environment Day 1980
Guru Amar Das / World Environment Day 1980
Swamp Deer & Bengal Tiger - Indian Wildlife
Swamp Deer & Bengal Tiger - Indian Wildlife
IUCN Tiger Conservation - New Delhi 1969
IUCN Tiger Conservation - New Delhi 1969
Winifred S. LaRose, Adirondack Park Centennial 1992
Winifred S. LaRose, Adirondack Park Centennial 1992
Duck Stamp 50th Anniversary, 1984
Duck Stamp 50th Anniversary, 1984
1981 Wildlife Habitats - Save Mountain Habitats
1981 Wildlife Habitats - Save Mountain Habitats
Duck Festival 50th Anniversary - Preserving Wetlands
Duck Festival 50th Anniversary - Preserving Wetlands
4-Cent Forest Conservation Stamp, First Day Cover, 1958
4-Cent Forest Conservation Stamp, First Day Cover, 1958
Save the Ozone Layer - 1992 Flags Stamp
Save the Ozone Layer - 1992 Flags Stamp