Michael McGerr/ Jan Ellen Lewis/ James Oakes/ Nick Cullather/ Mark Summers
(4)
Michael Summers/ James Trefil
(2)
James Trefil/ Michael Summers
(1)
Kathryn Summers/ Michael Summers
(1)
Michael E. Summers/ James Trefil
(1)
Michael Summers/ James Trefil/ Jon Bennett (NRT)
(1)