HARRER C.M. AND KELLEY F.J. RECONNAISSANCE OF IRON RESOUR-CES IN NEW MEXICO USBM I.C. 8190 1963 P 63JAHNS RICHARD H. MICA DEPOSITS OF THE PETACA DISTRICT, RIOARRIBA COUNTY, NEW MEXICO NMBM BULL. 25 1946 P 19BERTHOLE W.E.II MAGNETITE TACONITE ROCK IN PRECAMBRIANFORMATIONS IN RIO ARRIBA COUNTY, NEW MEXICO NMBM CIRC. 541960 P 17