Object's details: Sposób wytwarzania kwasu mrówkowego z mrówczanów : opis patentowy : nr 18278 : kl. 12 o, 11
Provider:Polona
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Sposób otrzymywania 1-fenylo-2,3-dwumetylo-5-pyrazolonu : opis patentowy : nr 21628 : Kl. 12 p, 8/01
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