Lawson, Mary H.,"Byrd Antarctic Issue", Arago: people, postage the post, National Postal Museum. Viewed March 22, 2014.
<coherence> Lawson, Mary H.,"Byrd Antarctic Issue", Arago: people, postage the post, National Postal Museum. Viewed March 22, 2014.
Lawson, Mary H.,"Byrd Antarctic Issue", Arago: people, postage 