Observing party on 103-foot tower in Missouri.Triangulation party of Carl I. Aslakson
3/18/2019 2:24:55 PM
Date: 1935
Credit: Family of Captain Carl I. Aslakson, C&GS;
Location: Missouri Ozarks
Subject: Geodesy
Subject: Triangulation
Subject: Towers
Subject: Bilby Steel