Kammerling, Robert C.
Most widely held works by Robert C Kammerling
Gemology by Cornelius S Hurlbut ( Book )
7 editions published in 1991 in English and held by 414 WorldCat member libraries worldwide
Gemología by Cornelius S Hurlbut ( Book )
3 editions published in 1993 in Spanish and held by 8 WorldCat member libraries worldwide