found: Its Annual report & accounts 1997:t.p. (Port of London Authority) p.2 (PLA)
found: Port of London handbook 1994:p.1 (Port of London Authority) p.5 (established as a public trust in 1908; self-financing, non-profit-making body; PLA administers the Port of London as a whole)
found: Its website, viewed 15 Jan. 2015:home p. (Port of London Authority) about p. (its operations cover 95 miles of the River Thames) contact p. (Port of London Authority, London River House, Royal Pier Road, Gravesend, Kent DA12 2BG)
found: Wikipedia, viewed 15 Jan. 2015:under Port of London Authority (the PLA originally had its headquarters on Tower Hill in the City of London, but today has its headquarters in Gravesend) under Port of London (The Port of London lies along the banks of the River Thames from London, England to the North Sea; not located in one area)