Maryland Route 138 (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Maryland Route 138" in English language version.

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archive.org

Weller, O.E.; Parran, Thomas; Miller, W.B.; Perry, John M.; Ramsay, Andrew; Smith, J. Frank (May 1916). Annual Reports of the State Roads Commission of Maryland (1912–1915 ed.). Baltimore: Maryland State Roads Commission. p. 128. Retrieved 2011-07-31.
Mackall, John N.; Darnall, R. Bennett; Brown, W.W. (January 1927). Annual Reports of the State Roads Commission of Maryland (1924–1926 ed.). Baltimore: Maryland State Roads Commission. pp. 44. 69. Retrieved 2011-07-31.
Uhl, G. Clinton; Bruce, Howard; Shaw, John K. (October 1, 1930). Report of the State Roads Commission of Maryland (1927–1930 ed.). Baltimore: Maryland State Roads Commission. pp. 68, 199. Retrieved 2011-07-31.
Byron, William D.; Lacy, Robert (December 28, 1934). Report of the State Roads Commission of Maryland (1931–1934 ed.). Baltimore: Maryland State Roads Commission. p. 320. Retrieved 2011-07-31.
Tabler, H.E.; Wilkinson, C. Nice; Luthardt, Frank F. (December 4, 1936). Report of the State Roads Commission of Maryland (1935–1936 ed.). Baltimore: Maryland State Roads Commission. p. 81. Retrieved 2011-07-31.

Google (2011-07-31). "Maryland Route 138" (Map). Google Maps. Google. Retrieved 2011-07-31.

Maryland Geological Survey (1921). Map of Maryland: Showing State Road System and State Aid Roads (PDF) (Map). Baltimore: Maryland Geological Survey.
Maryland Geological Survey (1927). Map of Maryland: Showing State Road System and State Aid Roads (PDF) (Map). Baltimore: Maryland Geological Survey.
Maryland Geological Survey (1928). Map of Maryland: Showing State Road System and State Aid Roads (PDF) (Map). Baltimore: Maryland Geological Survey.
Maryland Geological Survey (1933). Map of Maryland Showing State Road System: State Aid Roads and Improved County Road Connections (PDF) (Map). Baltimore: Maryland Geological Survey.
Maryland State Roads Commission (1936). Map of Maryland Showing State Road System (PDF) (Map). Baltimore: Maryland State Roads Commission.
Maryland State Roads Commission (1968). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Roads Commission.
Maryland State Highway Administration (1972). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Highway Administration.
Maryland State Highway Administration (1987). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Highway Administration.
Maryland State Highway Administration (1995). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Highway Administration.

Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved 2011-07-31.
- Baltimore County (PDF).

Monkton, Maryland, United States (Map). Topo Map. United States Geological Survey. 1974-07-01. Retrieved 2011-07-31.

"NBI Structure Number: 200000B-0014010". National Bridge Inventory. Retrieved 2011-07-31.