Robert A. Otter
- William and Edward Mackenzie as Railway Contractors: The Evidence of J. H. Watel's Office Diaries from 1849 and 1850. In: Transactions of the Newcomen Society, v. 72, n. 2 (Januar 2000). (2000):
- The Construction of Dry Docks to World War I: The Evidence ofThe Engineer. In: Transactions of the Newcomen Society, v. 74, n. 2 (Januar 2004). (2004):