https://depot-numerique-cnrc.canada.ca/eng/view/object/?id=ca70db4d-573f-4f9e-aeee-6a898e1397a0
Photogrammetry- Smialewski and Helava 1964 003 - NRC Digital Repository - Canada.ca
Photogrammetry- Smialewski and Helava 1964 003
digital repositoryphotogrammetry
https://depot-numerique-cnrc.canada.ca/eng/view/object/?id=62479782-145b-42b1-8f7e-e90a304711a8
Photogrammetry- Smialewski and Helava 1964 004 - NRC Digital Repository - Canada.ca
Photogrammetry- Smialewski and Helava 1964 004
digital repositoryphotogrammetry