Study of Missouri Shales for Lightweight Aggregate

by P.G. Herold, P. Kurtz, Jr., T.J. Planje and J.D. Plunkett,
39 p., 11 figs., 5 tbls., 1958.
Discusses bloating characteristics of 55 samples of
shales, clay, and loesses and gives data on relationship
of bloating mechanism and chemical composition.