Medium.com article from Lee Ziesche
Owen Franken Photography - Under Archives, Search "McCarthy"
www.owenfranken.com
Owen Franken Portfolio
James R. Thompson
jamesrthompsonphotography.com
Catherine Leroy: Vietnam War Photographer
Under Fire: Vietnam War Photographs
David Levine Art
www.davidlevinecaricatures.com
Paul Bengston - Political memorabilia collection including a vast assortment of McCarthy buttons and posters
paul@7cpco.com
Finney Company - Eugene McCarthy titles
http://www.finney-hobar.com/index.html
MNOPEDIA
http://www.mnopedia.org/person/mccarthy-eugene-1916-2005
The Eugene J. McCarthy Collection at the University of Minnesota
https://umedia.lib.umn.edu/taxonomy/term/734
Minnesota Historical Society
http://www.mnhs.org/exhibits/gloriousburden/mccarthy.php
http://libguides.mnhs.org/mccarthy/primary
https://umedia.lib.umn.edu/taxonomy/term/734