1948
Bibliografía (21 obras)
Gemstone buying guide
2016
Rare gemstones
2012
Exotic gems
2010
Pearl buying guide
Diamond handbook
2008
Jewelry handbook
2007
Osteoporosis prevention
2006
Diamond ring buying guide
2002
Gem & jewelry pocket guide
2001
Ruby, sapphire & emerald buying guide
2000
Gold & platinum jewelry buying guide
1998
Emerald & tanzanite buying guide
1995
The gold jewelry buying guide
1993
The pearl buying guide
1992
The ruby & sapphire buying guide
1991
The diamond ring buying guide
1989
