Highland Operation

CALVER, J.L. MINING AND MINERAL RESOURCES. FLORIDA GEOL.SURVEY BULL. NO. 39, 1957, PP. 15-33.CARPENTER, J.H., ET AL. MINING AND CONCENTRATION OF ILMEN-ITE AND ASSOCIATED MINERALS AT TRAIL RIDGE, FLORIDA.MIN. ENG., V. 5, AUGUST 1953, PP. 789-795.CLARK, W.E., ET AL. INTERIM REPORT ON THE WATER RESOURCESOF ALACHUA, BRADFORD, CLAY, AND UNION COUNTIES,FLORIDA. FLORIDA GEOLOGICAL SURVEY INFORMATION CIRCULAR NO.36, 1962, P. 62.GROGAN, R.M., ET AL. MILLING AT DU PONT'S HEAVY MINERALMINES IN FLORIDA. MILLING METHODS IN THE AMERICAS. N.ARBITAR, ED., GORDON AND BREACH, NEW YORK, 1964,PP. 205-229.ROBERTS, A.E. HOW NEW $3,000,000 HIGHLAND PLANT RECOVERSTITANIFEROUS MINERALS. MIN. WORLD, OCTOBER 1955,PP. 52-55, 72.