Hartz

Bu kavram başka kaynaklarda da geçiyor

• The Century Cyclopedia of Names (1904)
• The Century Dictionary and Cyclopedia (1897)
• Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
• Harz — Everybody's Encyelopedia (1912)
• HARZ — An Illustrated Encyclopedic Medical Dictionary (1893)