Smyth, R. Brough & Mayes, C. Ernest. (1857). Magnetic observations : are they as useful as necessary? Retrieved January 18, 2020, from http://nla.gov.au/nla.obj-390191437
Smyth, R. Brough and Mayes, C. Ernest. Magnetic observations : are they as useful as necessary? [Melbourne: , 1857. Web. 18 January 2020 <http://nla.gov.au/nla.obj-390191437>
Smyth, R. Brough & Mayes, C. Ernest. 1857, Magnetic observations : are they as useful as necessary? , [Melbourne viewed 18 January 2020 http://nla.gov.au/nla.obj-390191437
| author1=Smyth, R. Brough.
| author2=Mayes, C. Ernest.
| title=Magnetic observations : are they as useful as necessary?
| section=12 pages ; 22 cm.
| access-date=18 January 2020
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