Phosphate Mining in Central Florida

Front:
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Back:
LK.16--RIDGE DISTRIBUTING CO., P. O. BOX 382, LAKELAND, FLORIDA PHOSPHATE MINING IN CENTRAL FLORIDA WHERE A LARGE PERCENTAGE OF THE WORLD'S PHOSPHATE IS FOUND. (REG. U. S. A. PAT. OFF.) CURTEICHCOLORⓇ 3-D NATURAL COLOR REPRODUCTION 7DK-438