The Hallmark Research Institute (HRI) was founded by William Whetstone, Danusia Niklewicz, and Lindy Matula as a means to further the understanding of world hallmarks through lectures and their publications “World Hallmarks – Vol. I – Europe, 19th to 21st Centuries” and Vol. II – covering Asia, the Middle East, Africa, Australia, and the Americas.
Further Resources
External Link
www.hallmarkresearch.org