'Telegraph' Todd and the Semaphore Time Ball

Abell, Lesley JeanKinns, Roger2011-05-192011-05-192010Historical Society of South Australia. Journal, 2010; 38:42-570312-9640http://hdl.handle.net/2440/63722enCopyright status unknown'Telegraph' Todd and the Semaphore Time BallJournal article0020105066