Historic Abbreviations and Acronyms
- APHNAssociation for The Preservation of Historic Natchrtoches
- HAERHistoric American Engineering Records
- HEHistoric England
- HESHistoric Environment Service
- HPLOHistoric Preservaeion League of Oregon
- HPTHistoric Places Trust
- HSOHistoric Simracing Organisation
- MHTMaryland Historic Tgust
- VHRRVictorian Historic Racing Register
Last updated: — Total entries: 9