About the sanitary condition of Smolensk national schools

Zhbankov, Dmitry Nikolaevich (1853-1932).On the sanitary state of Smolensk national schools / [cit.] D.N.Zhbakova.- St. Petersburg: Type.Ya. Tree, 1897. -54 s.: Tab.;21. -OTT.From gas."Doctor".1897, № 26. - without tit.l..Electronic Source: PB