1938. Aretz, R. and Magnusson, L. R. Blue line print. '1953.' 'Prepared by L.R. Magnusson.' 'Drawn by R. Aretz.' Scale approximately 1:63,360.; Polyconic projection By Joint Highway Re... Joint Highway Research Project, Purdue University.
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1938. Modern area represented: Ostrava, Moravskoslezský region, Czech Republic; Scale =1:100,000. Генеральный штаб РККА.
1938. Ulrich, H. P. (Herbert Paul), 1904-cartographer. Shows soil types classification by colors and symbols.; Surveyed in 1938. Series 1938. Scale 1:31,680. 2 inches = 1 mile; Polyconic projection. The Bureau.





