Geological Structure and Mineralogy of the Kimberlites of the Archangelsk Kimberlite Province - Kudrjavtseva, G.P.; Bushueva, E.B.; Vasiljeva, E.B.; Verichev, E.R.; Garanin, V.K.; Grib, V.P.; Laverova, T.N.; Mikhailichenko, O.A.; Posukhova, T.V.; Schepina, N.A. (International Kimberlite Conference: Extended Abstracts, 1991)