P00492 new approved HU HJA conventionDeclaration http://viaf.org/viaf/24705485 detailLevel http://ica-atom.org/doc/RS-2#5.4 created December 25, 2021 12:32:28 AM CET human revised February 12, 2023 8:41:12 PM CET human https://hu.wikipedia.org/wiki/Pyrker_J%C3%A1nos_L%C3%A1szl%C3%B3 person Pyrker János conventionDeclaration 1772-1847