http://nla.gov.au/nla.obj-233815793
Great Britain. Hydrographic Dept & Barrow, John & Potter, J. D & Tyers, C. J & J. & C. Walker. (1856). Australia, South Coast, Portland Bay with additions from a survey by Mr C.J. Tyers in 1840 Retrieved March 31, 2025, from http://nla.gov.au/nla.obj-233815793
Great Britain. Hydrographic Dept, Barrow, John, Potter, J. D, Tyers, C. J and J. & C. Walker. Australia, South Coast, Portland Bay with additions from a survey by Mr C.J. Tyers in 1840 London: Published at the Hydrographic Office of the Admiralty ; Sold by J.D. Potter, agent for the Admiralty charts, 31 Poultry & 11 King Street, Tower Hill, 1856. Web. 31 March 2025 <http://nla.gov.au/nla.obj-233815793>
Great Britain. Hydrographic Dept & Barrow, John & Potter, J. D & Tyers, C. J & J. & C. Walker. 1856, Australia, South Coast, Portland Bay with additions from a survey by Mr C.J. Tyers in 1840 Published at the Hydrographic Office of the Admiralty ; Sold by J.D. Potter, agent for the Admiralty charts, 31 Poultry & 11 King Street, Tower Hill, London viewed 31 March 2025 http://nla.gov.au/nla.obj-233815793
{{Citation
| author1=Great Britain. Hydrographic Dept.
| author2=Barrow, John.
| author3=Potter, J. D.
| author4=Tyers, C. J.
| author5=J. & C. Walker.
| title=Australia, South Coast, Portland Bay with additions from a survey by Mr C.J. Tyers in 1840
| year=1856
| scale=Scale 1:36,500.
| section=1 map ; 57.4 x 42.3 cm.
| location=London
| publisher=Published at the Hydrographic Office of the Admiralty ; Sold by J.D. Potter, agent for the Admiralty charts, 31 Poultry & 11 King Street, Tower Hill
| url=http://nla.gov.au/nla.obj-233815793
| id=nla.obj-233815793
| access-date=31 March 2025
| via=Trove
}}
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