Note 25 — TRANSACTIONS (continued 3)
Reading edition
“Washing and Coking Tests,” by Richard Moldenke, A. W. Belden and G. R. Delamater, Bulletin No. 336, U. S. Geological Survey, 1908; also, “Washing and Coking Tests at Denver, Colo.,” by A. W. Belden and G. R. Delamater, Bulletin No. 368, U. S. Geological Survey, 1909.