Author
- A Citizen 1 results
- A Stockholder 1 results
- A member of the bar, pseud 1 results
- Albertype Co 1 results
- Albrecht, Harry P. 1 results
- Alexander, Edwin P. 1 results
- Alleghany Railroad and Coal Co 1 results
- Alleghany Railroad and Coal Company 1 results
- Allegheny Portage Railroad Company 1 results
- Allegheny Valley Railroad Company 1 results
- Allegheny Valley Railway Company 1 results
- Allen, John E. 2 results
- Allen, Lane & Scott 1 results
- Alwine, Leonard E. 1 results
- America's Industrial Heritage Project 2 results
- American Society of Civil Engineers 1 results
- American Transit Accountants' Association 1 results
- American street and interurban accountants' association 1 results
- Andrews, Clinton T. 2 results
- Archer, Robert F. 1 results
- Arnold, Andrew Bernard 2 results
- Ashbridge, Thomas 1 results
- Atterbury, William Wallace, 1866-1935 2 results
- Awbury Arboretum (Philadelphia, Pa.) 1 results
- Bache, Hartman, 1797-1872 1 results
- Bache, Hartman, 797-1872 1 results
- Bacon, Margaret Hope 1 results
- Baker, Joseph B. 1 results
- Bakewell, Thomas, 1792-1866 1 results
- Baltimore 1 results
- Baltimore (Md.) Citizens 1 results
- Baltimore (Md.) Delegation to the Susquehanna Railroad Convention 1 results
- Baltimore Citizens 1 results
- Baltimore and Ohio Railaroad Co 1 results
- Baltimore and Ohio Railroad Company 4 results
- Baltimore and Susquehanna Railroad Co 1 results
- Baltimore and Susquehanna Railroad Company 1 results
- Bank of the United States (Pennsylvania : 1836-1841) 3 results
- Barclay Coal Company 1 results
- Barclay Railroad Company 1 results
- Barry, Steve 1 results
- Beach, Ephraim 1 results
- Beaver Meadow Railroad and Coal Company 2 results
- Bell, D. Sargent, 1876-194- 2 results
- Bellas, Hugh, 1780-1863 2 results
- Bernhart, Benjamin L., 1 results
- Bernhart, Benjamin L., (author) 4 results
- Bernhart, John H. L. Dr., 1 results
- Bernhart, John L. Dr., 1 results
- Bethlehem Railroad Company 2 results more…