http://nla.gov.au/nla.obj-1937774956
Madsen, Roger. (2019). H.F. Madsen & J.P.V. Madsen : pioneers of Australian science - the beginning Retrieved February 18, 2026, from http://nla.gov.au/nla.obj-1937774956
Madsen, Roger. H.F. Madsen & J.P.V. Madsen : pioneers of Australian science - the beginning Allambie Heights, N.S.W: Roger Madsen, 2019. Web. 18 February 2026 <http://nla.gov.au/nla.obj-1937774956>
Madsen, Roger. 2019, H.F. Madsen & J.P.V. Madsen : pioneers of Australian science - the beginning Roger Madsen, Allambie Heights, N.S.W viewed 18 February 2026 http://nla.gov.au/nla.obj-1937774956
{{Citation
| author1=Madsen, Roger.
| title=H.F. Madsen & J.P.V. Madsen : pioneers of Australian science - the beginning
| year=2019
| section=1 online resource (29 pages) : illustrations (some colour), portraits, map, facsimiles.
| location=Allambie Heights, N.S.W
| publisher=Roger Madsen
| url=http://nla.gov.au/nla.obj-1937774956
| id=nla.obj-1937774956
| access-date=18 February 2026
| via=Trove
}}
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