Pete J. Dunn & Willard L. Roberts (1986)Cuprocassiterite Discredited as Mushistonite; And an Unnamed Tin Mineral from the Etta Mine [South Dakota] Mineralogical Record 17:383
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.