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west: explore 20 source-linked works published from 1850 to 1900, with original documents and citations.

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Includes records with this source-supplied label or an explicit phrase match in their metadata. Matches indicate a mention, not proof that a paper uses a method or tests a material. Source versions are consolidated by DOI.

Sources: loc. Collection updated 2026-09-22. Counts describe this index, not the complete source archives.

Library of Congress1855

Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean. Route near the 38th & 39th parallels

Relief shown by hachures and spot heights. From U.S. War Department, Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. Topographical Maps ... to Illustrate the Various Reports ... (Washington, 1859) Scale 1:760,320; 12 miles to 1 in. LC Railroad maps, 160 LC Railroad maps, 161 LC Railroad maps, 162 LC Railroad maps, 163 Available also through the Library of Congress Web site as a raster image. AACR2: 100, 650/1; 700/1; 700/2; 700/3; 700/4; 700/5; 710/1

united states↗

Library of Congress1850

A map illustrative of the route of the proposed railroad : from St. Louis to the Bay of San Francisco

"The red line indicates the route of the Railroad. The green line is the route followed by Col. Fremont from the South Pass to Humboldt River."

united states↗

Compare source metadata on this page

Work	Published	Source identifier	Source
Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean. Route near the 38th & 39th parallels	1855	gm70005008	loc
A map illustrative of the route of the proposed railroad : from St. Louis to the Bay of San Francisco	1850	98688414	loc

These are bibliographic comparisons, not experimental rankings. Follow the original document for methods and conditions.