Proceedings and papers of the second International Congresses of Soil Science : Leninrad-Moscow, USSR, July 20-31, 1930 / Ed. by A.N. Sokolovsky, N.A. Kachinsky; The Organizing Kommittee of the Second International Congresses of Soil Science.

Com. I (1932, 304 p.) : Soil phisics Com. II (1933, 226 p.) : Soil chemistry / Ed. by K.K. Gedroiz, D.L. Askinasi Com. III (1932, 301 p.) / Ed. by E. Uspensky, A. Voitkevich Com. IV (1932, 262 p.) : Soil fertility / Ed. by D.N. Prjanischnikow, N.S. Sokolov Com. V (1932, 424 p.) : Classification, geography and cartography of soils / Ed. by L.J. Prassolov, D.G. Vilensky Com. VI (1932, 320 p.) : Application of soil science to agricultural technology / Ed. by A.N. Kostiakov, V.S. Dokrovsky