Fatawa Ridwiya 30 volumes in Urdu (فتاویٰ رضویہ)
A voluminous work consisting of the fatawa of Alaa Hazrat Imam Ahmed Rida Barelvi on many various matters of Fiqh.
فتاویٰ اعلیحضرت امام احمد رضا خان بریلوی
A unique research book with more than 21000 pages, which is unanimously called Encyclopedia of Fiqh Hanafi. As it contains unique research on hundreds of topics.