Van Kauwenbergh S.J. Mineralogy and alteration of the phosphate deposits of Florida / S.J.Van Kauwenbergh,J.B.Cathcart,G.H.McClellan, 1990. - 46 p. - Текст : непосредственный.
Cathcart J.B. Mineralogy and chemistry of samples from a drill hole in the southern extension of the Land-Pebble Phosphate District, Florida : Econ. of phosphate meniralogy a. chemistry in an area of possible future mining / J.B.Cathcart,T.Botinelly, 1991. - 25 p. - Текст : непосредственный.