National Library of Australia has started to put 1930s maps on line. It may be of interest to those designing routes for that era.
http://catalogue.nla.gov.au/Search/Home?lookfor=my_parent:"(AuCNL)4970017"&iknowwhatimean=1
or http://tinyurl.com/3cudver
http://catalogue.nla.gov.au/Search/Home?lookfor=my_parent:"(AuCNL)4970017"&iknowwhatimean=1
or http://tinyurl.com/3cudver