www.lighthousestampsociety.org

Anchor text: Stamp images, Great Lakes Lighthouses.

Wikipedia: Marblehead Light (Ohio)

Anchor text: Stamp images, Great Lakes Lighthouses.

Wikipedia: Split Rock Lighthouse

Anchor text: Lighthouse Stamp Society, Sand Island Light cancellation.

Wikipedia: Sand Island Light (Alabama)

Anchor text: Alpena Light cancellation.

Wikipedia: Alpena Light

Anchor text: Stamp images, Great Lakes Lighthouses.

Wikipedia: Spectacle Reef Light

Anchor text: Stamp images, Great Lakes Lighthouses.

Wikipedia: Thirty Mile Point Light

Anchor text: Photo of a Cape Verdean stamp at the Lighthouse Stamp Society.

Wikipedia: Ponta Preta Lighthouse