GEOLOGY OF THE BUTT MOUNTAIN AREA, A SOURCE OF THE TUSCAN FORMATION IN NORTHERN CALIFORNIA.LYDON PA.1969; DISSERT. ABSTR. INTERNATION., B; USA; 1969(8), VOL. 30, NUM. 0002Miscellaneous

GEOLOGY AND LAHARS OF THE TUSCAN FORMATION, NORTHERN CALIFORNIA.LYDON PA.1968; GEOL. SOC. AMER., MEM.; USA; 1968, NUM. 0116, P. 441 A 475Miscellaneous

GEOLOGY OF THE SOUTHEAST QUARTER OF TRINITY LAKE QUADRANGLE, TRINITY COUNTY, CALIFORNIA. 1/4 S.E. TRINITYLAKE.LYDON PA; KLEIN IE.1969; CALIFORNIA, DIV. MINES GEOL., MAP SHEET; USA; 1969, NUM. 0012Miscellaneous