The Chicago Tribune Historical Image Collection

1 to 2 of 2 pieces in Forest Products Laboratory (U.S.)--People--1930-1940

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Tree rings : Arthur Koehler
Title:
Tree rings : Arthur Koehler
Published:
1935-03-10
View:
jpg (222 KB) | pdf (5,472 KB) | details
Tree rings : Koehler as he explained to the jury
Title:
Tree rings : Koehler as he explained to the jury
Published:
1935-03-10
View:
jpg (222 KB) | pdf (5,472 KB) | details
of 1