The upper mantle - Ritsema, Ann Reinier (Amsterdam: Elsevier North-Holland, 1972)
'Upper mantle scientific report no. 41, reprint from Tectono-physics, v. 13'
'Papers presented at the final Symposium on the Upper Mantle Project held in Moscow 9-13 August, 1971'
Keywords: Earth (Planet) -- Mantle -- Congresses; Earth (Planet) -- Crust -- Congresses; International Upper Mantle Project