Phylogenetic Analysis of the Family Beloceratidae (Ammonoidea, Late Devonian ) and a new Beloceras Species From eastern Iran

/ Hairapetian , Vachik

Concentration of oxide manganese ores from san bernardino county, calif .

/ W.W.Agey ,S.J. Hussey, and W.G.Long.

Chloride volatilization and other tests on a gold - copper ore

/ A.L.Engel and H.J.Heinen

Concentration of oxide manganese ores from lander county, nev.

/ T.F.Mitchell .R.R.Wells . and W.G.Sandell

A mineral- dressing study of manganese deposits of the batesville, ark.,district

/ M.M. Fine