Dear Ms. Shuman,
Thank you for posting your request on History Hub!
NHABGrodno is the abbreviation for the National Historical Archives of Belarus Grodno. For the information you seek, we suggest contacting the National Historical Archives of Belarus Grodno, ul. Skoriny, 51, korp. 2, room 409, Minsk, 220141, Belarus. For more information on locating marriage records and other vital records, you may wish to review the information on their Genealogy Family History page:. The email address for reference inquiries is email@example.com.
Also, the FamilySearch Research wiki for Belarus Genealogy may be useful.
We hope this is helpful. Best of luck with your family research!