| Reference | {Deposit:: STOCKLEY, 1955, GEOLOGICAL SURVEY BR. GUIANA, BULL. 25, P. 73 - 74}{Deposit:: SPENCER, 1924, MIN. MAG., V. 20, P. 217 - 219}{Deposit:: SPENCER, 1924, MIN. MAG. V. 20, P. 186 - 192}{Deposit:: SPENCER, 1928, MIN. MAG, V. 21, P. 397 - 406} |