Stamps of Sweden, Marine Research issue

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1979, Oct 6 Marine Research issue unwmk (5 stamps)

X	1.70kr		Age Determination - Atlantic Herring Clupea harengus, p. 12.5h
X	1.70kr	dkviobrn	Acoustic mapping, p. 12.5h
X	1.70kr		Algae bloom
X	1.70kr	dkviobrn	Distribution of Herring
X	1.70kr		the Argos, p. 12.5h

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