American Costume Jewelry
Authors: Carla and Roberto Brunialti

Bakelite Bangles - Price & Identification Guide
Author: Karima Parry

Collectible Costume Jewelry - Identifications & Values
Author: Cherri Simonds

The Confident Collector - 3rd Edition
Author: Harrice Simons Miller

Costume Jewelry - A Practical Handbook & Value Guide
Author: Fred Rezazadeh

The Little Book of Mexican Silver Trade & Hallmarks
Author:Bille Hougart

Mexican Silver - 2nd Edition
Author: Morrill & Berk

Unsigned Beauties of Costume Jewelry
Author: Marcia "Sparkles" Brown

Warman's Jewelry - Identification & Price Guide - 3rd Edition
Author: Christie Romero

Miriam Haskell Jewelry. Author: Cathy Gordon & Sheila Pamfiloff.

Answers to Questions About Old Jewelry
Author: C. Jeanne Bell

Popular Jewelry 1840-1940
Author: Roseann Ettinger

What's It Made Of? Jewelery Materials Identification Guide - 3rd Edition
Author: Sheryl Shatz
This must have guide is available on my site