http://nla.gov.au/nla.obj-462326250
(). Two men examining the rotating mechanism of the Fresnel lens and its radial glass prisms of Nobbys lighthouse, Nobbys Head, New South Wales, 18 May 1949, 1 Retrieved December 8, 2025, from http://nla.gov.au/nla.obj-462326250
Two men examining the rotating mechanism of the Fresnel lens and its radial glass prisms of Nobbys lighthouse, Nobbys Head, New South Wales, 18 May 1949, 1 : , . Web. 8 December 2025 <http://nla.gov.au/nla.obj-462326250>
, Two men examining the rotating mechanism of the Fresnel lens and its radial glass prisms of Nobbys lighthouse, Nobbys Head, New South Wales, 18 May 1949, 1 , viewed 8 December 2025 http://nla.gov.au/nla.obj-462326250
{{Citation
|
| title=Two men examining the rotating mechanism of the Fresnel lens and its radial glass prisms of Nobbys lighthouse, Nobbys Head, New South Wales, 18 May 1949, 1
| year=
| section=1 online resource (1 negative) : TIFF file, black and white
| series=Newcastle Morning Herald and Miner's Advocate archive, 1900-1960.
| publisher=
| url=http://nla.gov.au/nla.obj-462326250
| id=nla.obj-462326250
| access-date=8 December 2025
| via=Trove
}}
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