In this regular feature about postal history, Straight examines efforts at reducing smog—smoke abatement, at the time—using a 1906 card and coal company letterhead as a springboard.
Straight, David L.
"“It Don’t Look Natural”: St. Louis Smoke Abatement in 1906,"
The Confluence (2009-2020): Vol. 2
, Article 7.
Available at: https://digitalcommons.lindenwood.edu/confluence_2009/vol2/iss1/7