[Observations on Streptococcus group infections among the ship crew].
D006801:Humans; D008297:Male; D009326:Naval Medicine; D011044:Poland; D012767:Ships; D013290:Streptococcal Infections / Q000453:epidemiology*
Nabliudeniia kasaiushchiesia infektsii Streptokokkami gr. a u ékipazha korabliia.