STD- sea level meter IUM-1 25.03.202011.10.2003 by pressgp V. A. Gaisky, N. A. Grekov, P. V. Gaisky, A.V. Klimenko, A. N. Logvinchuk,V. Zh.Mishurov, M. N. Penkov, V. A. Trofimenko. (reviewed by V. Z. Dykman). Full text in PDF(RUS)