[I.P. Pavlov's letters to M. N. Shaternikov, S.I. Chechulin and G. Kovan'ko].
D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans
BIOGRAPHIES
PISMA I. P. Pavlova, M.N. Shaternikovu, S. I. Chechulinu i G. Kovan'ko.