Mongolija i kam : trechletnee putešestvie po Mongolii i Tibetu (1899-1901 gg.) - Kozlov, Pëtr Kuz´mič 1863-1935 (Gosudarstvennoe izdat. geografičeskoj lit., 1947)
Mongolei und Kam: Reise durch die Mongolei und den Tibet (1899-1901)
First abridged ed. was published in 1913 under title: Trekhlietnee puteshestvie po Mongolii i Tibetu. Complete ed. was published under title: Mongoliia i Kam'', and constituted v. 1 of Mongoliia i Kam''; trudy Ekspeditsii Imperatorskago Russkago geograficheskago obshchestva, sovershennoi v'' 1899-1901 g.g. pod'' rukovodstvom'' P. K. Kozlova. S.-Peterburg'', 1905-06.