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OtwockSanatoriumGurewicza. Sanatorium Gurewicza Otwocku okresie miedzywojennym egzemplarz stylu architektonicznego zwanego widermajer Mazowsza Gurewicz retreat before World War II example of widermajer distinct Polish architectural style developed in late th and early th century in Masovia otwock pl asp ID rg IDg Postcard from