[The Nizhegorod period in the life of A. N. Sysin (on the centenary of his birth)].
D049672:History, 19th Century; D049673:History, 20th Century; D011634:Public Health / Q000266:history; D012425:Russia (Pre-1917)
Nizhegorodskiĭ period v zhizni A. N. Sysina (k 100-letiiu so dnia rozhdeniia).