"What was a Railroad?". (Includes illustration of a length of strap rail.). Past Tracks. Archived from the original on 23 May 2011. Retrieved 1 February 2011.
"What was a Railroad?". (Includes illustration of a length of strap rail.). Past Tracks. Archived from the original on 23 May 2011. Retrieved 1 February 2011.
"What was a Railroad?". (Includes illustration of a length of strap rail.). Past Tracks. Archived from the original on 23 May 2011. Retrieved 1 February 2011.
"What was a Railroad?". (Includes illustration of a length of strap rail.). Past Tracks. Archived from the original on 23 May 2011. Retrieved 1 February 2011.