Prospecting for gemstones and minerals

Antzeko izenburuak

• Gemstones and minerals /
  nork: Sinkankas, John
  Argitaratua: (1961)
• Prospecting for gemstones and minerals indal
  nork: Sinkankas, John
  Argitaratua: (1970)
• Rocks, minerals and gemstones
  nork: Evans, I.O
  Argitaratua: (1972)
• Minerals, rocks and gemstones
  nork: Mykura, W.
  Argitaratua: (1962)
• Gemstones /
  nork: Hall, Cally
  Argitaratua: (2000)