Resources Used On Cards or In General
Listed alphabetical order (not everything listed yet)

African:

Celtic:

The Encyclopedia of Celtic Mythology and Folklore By: Patricia Monaghan

Dictionary of Celtic Mythology By: Peter Berresford Ellis

China:

Egyptian:

Egyptian Mythology A to Z 3rd Edition By: Pat Remler

Egyptian Mythology A Guide to the Gods, Goddesses, and Traditions of Ancient Egypt By: Geraldine Pinch

India:

Tales Of India Folktales from Bengal, Punjab, and Tamil Nadu By: Chronicle Books

Tales Of Ancient India By: J.A.B. Van Buitenen

Indian Culture By: Anita Ganeri

Cultures of the World India By: Radhika Srinivasan

India the Culture By: Bobbie Kalman

Culture Smart India The Essential Guide to Customs and Culture, By Becky Steven

Indigenous Tribes:

Native American Wisdom By: Kent Nerburn and Louise Mengelkoch (Interesting read)

The First Fire: Stories of the Cherokee, Kickapoo, Kiowa, and Tigua By Jane Archer

Japanese:

The Book of Japanese Folklore: An Encyclopedia of the Spirits, Monsters, and Yokai of Japanese Myth By: Thersa Matsuura

Jewish Culture:

The Little Encyclopedia of Jewish Culture By: Matthew Klickstein

The New Jewish Encyclopedia: By: David Bridger and Samuel Wolk

Norse:

Norse Mythology A to Z By: Kathleen N. Daly

Encyclopedia of Norse and Germanic Folklore Mythology and Magic By: Claude Lecouteux

North How to Live Scandinavian By: Bronte Aurell (Interesting read, generalizations, not necessarily facts)

General Mythology:

The Ultimate Encyclopedia of Mythology By: Arthur Cotterell & Rachel Storm

Fabulous Creatures, Mythical Monsters, and Animal Power Symbols A Handbook By: Cassandra Eason

Other Books:

Natural Remedies- An Illustrated Guide to Healing Herbs By: Jean Willoughby

Floriography- An Illustrated Guide to Victorian Language of Flowers By: Jessica Roux

Irish Wild Plants- Myths, Legends, and Folklore By: Niall Mac Coitir

Beyond The Blue Horizon By: Dr. E.C. Krupp

Giants, Monsters, and Dragons Encyclopedia of Folklore Legend and Myth By Carol Rose

Websites: