Improvements in the hydrographic technic. A new apparatus for the taking of bottom-samples
Pettersson, O. (1929). Improvements in the hydrographic technic. A new apparatus for the taking of bottom-samples. Svenska Hydrografisk-Biologiska Kommissionens Skrifter. Serie Hydrografi, III. Wald. Zachrissons Boktryckeri: Göteborg. 5-8 pp.
Deel van: Svenska Hydrografisk-Biologiska Kommissionens Skrifter. Serie Hydrografi. Wald. Zachrissons Boktryckeri: Göteborg. , meer
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