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11. Milton, Pennsylvania, 1918

1918. Sanborn Map Company. Milton, Northumberland Co., Pennsylvania, Aug. 1918. 1 map on 25 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in.

12. Monongahela City, Pennsylvania, 1918

1918. Sanborn Map Company. Insurance maps of Monongahela City, Washington County, Pennsylvania, July 1918. 1 map on 16 sheets : col. ; sheets 65 x 54 cm. Scale approximately...

13. New Brighton, Pennsylvania, 1918

1918. Sanborn Map Company. Insurance maps of New Brighton, Beaver County, Pennsylvania, including Fallston, Sep't 1918. 1 map on 23 sheets : col. ; sheets 65 x 54 cm. Scale ...

14. Philadelphia, Pennsylvania, 1918

1918. Sanborn Map Company. Insurance maps of Philadelphia, Pennsylvania, Vol.7, 1918. 1 map in 28 vols.: col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in.

15. Philadelphia, Pennsylvania, 1918

1918. Sanborn Map Company. Insurance maps of Philadelphia, Pennsylvania, Vol.6, 1918. 1 map in 28 vols.: col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in.

16. Preliminary report on the geology of east central Minnesota, including the Cuyuna iron-ore district, Bulletin 15, Plate 1

1918. Harder, E.C. and Johnston, A.W. Map of East Central Minnesota showing location of rock outcrops (location of rocks exposed at the land surface), scale 1 inch = 10 miles.

17. Preliminary report on the geology of east central Minnesota, including the Cuyuna iron-ore district, Bulletin 15, Plate 2

1918. Harder, E.C. and Johnston, A.W. Map of the principal part of the Cuyuna Iron-ore District, showing the distribution of known iron-bearing rocks and lines of maximum magnetic attra...

18. Preliminary report on the geology of east central Minnesota, including the Cuyuna iron-ore district, Bulletin 15, Plate 3

1918. Harder, E.C. and Johnston, A.W. Map and sections showing the geology and workings of the Rowe Mine, Cuyuna Iron-ore District, surveyed in July, 1915, scale 1 inch = about 130 feet.

19. Preliminary report on the geology of east central Minnesota, including the Cuyuna iron-ore district, Bulletin 15, Plate 4

1918. Harder, E.C. and Johnston, A.W. Map and sections showing the geology and workings of the Pennington, Armour No. 1, and Armour No. 2 Mines, Cuyuna Iron-ore District, Minnesota, sur...

20. Preliminary report on the geology of east central Minnesota, including the Cuyuna iron-ore district, Bulletin 15, Plate 5

1918. Harder, E.C. and Johnston, A.W. Map and sections showing the geology and workings of the Thompson Mine, Cuyuna Iron-ore District, surveyed July, 1915, scale 1 inch = 130 miles.