America in Color from 1939-1943 is a nice collection of photos from The Denver Post. Here is how they describe them:
These images, by photographers of the Farm Security Administration/Office of War Information, are some of the only color photographs taken of the effects of the Depression on America’s rural and small town populations. The photographs are the property of the Library of Congress and were included in a 2006 exhibit Bound for Glory: America in Color.
The Denver Post review of “color in America 1939-1943 has a number of us photographers in southern New Mexico is a state of wondering – What kind of film?’
and the film sizes used. Some were obviously 4 x 5 pr perhaps larger, some ‘slide’ size.