These institutions often bind and preserve old periodicals and almanacs. You can request the 1998 Kalnirnay, scan the relevant pages on-site, and create your own personal PDF.
Have a specific muhurtha or date from 1998 that you need to check? Leave a comment below or consult a local astrologer with a copy of the 1998 panchang. Kalnirnay 1998 Marathi Pdf