V340 Ser and V448 Lac light curves
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https://b2find.eudat.eu/dataset/8d42e22b-f39f-5646-a8f0-ac8ca82a1d5c
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We analyze long-term UBV observations and ASAS-3 photometry for five candidates for protoplanetary nebulae - F and G supergiants with infrared excesses at high Galactic...
