Regarding the Tasmanian section, I am unsure whether this section has only just been started and is far from completion, but seems to focus almost completely on the Mt Lyell Abt railway on the West Coast, with only minor references to the original Launceston & Western Railway to Deloraine and the Tasmanian Main Line Railway Co.
As the MLM&RCo. is only a small part of the history of railways in Tasmania and is again mentioned in the section on the West Coast Wilderness Railway, it only needs a brief passing mention in the Tasmanian overview.
The Tasmanian overview would be better placed to describe chronologically the advent of the Launceston & Western Railway, (Lton - Deloraine) initially built to broad gauge followed by the Tasmanian Mainline Railway Co. (Hobart - Lton) built to narrow gauge, then following bankruptcy of both companies, the establishment of the Tasmanian Government Railways that took over both companies, converted the L&WR to narrow gauge and then progressively extended a network across the state, connecting Hobart with Launceston, Devonport, Burnie, Smithton, Scottsdale and many other rural locations. The TGR (and successors) was by far a more significant rail operation in Tas. than the MLM&RCo.
Not mentioned at all, but second in significance to the TGR was the Emu Bay Railway between Burnie and Zeehan, which connected the west coast with the rest of the state! Then there are the various interesting ultra narrow gauge (2' 0" (610mm)) gauge lines, such as the North East Dundas Rlwy, home of the world first Garratt locos, the Tullah Tramway (home of loco, "Wee Georgie Wood"), the Ida Bay Railway (most southerly railway in Australia) and various private "tramways" (private industrial railways) such as the Marrawah Tram (from Smithton to Redpa on Tasmania's far west coast) and the Styx Valley Tramway - home of Tasmania's only geared steam loco (of the "Climax" type) in the Derwent Valley.
There are a lot of interesting railways, past and present in Tas, virtually none of which are mentioned. Whilst Wikipedia is not the most reliable for accuracy, I would strongly suggest looking at it for a bit of an idea of what railways operated in Tas!
Finally, the section on WCWR is virtually completely wrong. The Mt Lyell Mining & Railway Co. started operating in 1892 (though it did "officially" open in 1897) initially to Teepookana on the King River. It only reached Regatta Point on Macquarie Harbour in 1899. It utilised the Swiss "Abt" rack system (not German) named after inventor Dr. Roman Abt. The original railway ran until 1963 (not 1932). It re-opened as a tourist railway in 2002.
The WCWR is not the only preserved railway in Tasmania. Other significant preserved railways and museums include the Don River Railway (Devonport), Derwent Valley Railway (New Norfolk), and Tasmanian Transport Museum, (Glenorchy). There are also popular preserved operations on some 2 foot lines such as the Wee Georgie Wood Railway in Tullah, Redwater Creek Railway in Sheffield (on an ex TGR 3' 6" line formation) and the Ida Bay Railway.
I would suggest you have a lot more research to do and additional information to add for the sections related to Tasmania before even contemplating that the project is anyway close to being finished!