Coleman, "2006 Spring Exploration: Tunnels, Joller, Mt. Union among the Destinations," p. Keller, "From the Archives [Rockhill Furnace foundry hoist]," p. Mellander, "A Weighty Issue: Rail Size and How They Scale Out in Miniature," p. Nale, "Page 625: Rockhill Coal's Heavy Lifter," p. Pearson, "Woodvale Company Store: Yesteryear's Shopping Mall," drawings (1/8 inch=1 foot), m, p.
Abbreviations denote the following features: g (graph), m (map), p (photograph), and s (sketch or non-photographic illustration).
