Ėfemery v rastitelʹnom pokrove vostochnoĭ Betpak-Dala = Ephemers in the plant cover of Betpak-Dala - Korovin, E. P. (Evgeniĭ Petrovich), 1891-1963 (Rezulʹtaty Betpak-Dalinskoĭ ėkspedi︠t︡sii Sredneaziatskogo gosudarstvennogo universiteta ;, 1935)