System of mineralogy of James Dwight Dana and Edward Salisbury Dana. Ed 7 Vol 3 Silica Minerals - Clifford Frondel (New York John Wiley and Sons, 1920)
Clifford Frondel: System of mineralogy of James Dwight Dana and Edward Salisbury Dana. Ed 7 Vol 3 Silica Minerals. (7th Edition.) New York. John Wiley and Sons, 1920.--(549FRO)
ENGLISH