- FondsRU-RNB/531 - Avraam Sergueïevitch Norov, letters
- FileRU-RNB/531/427 - Letters by Leonid Kavelin sent to A. S. Norov from 1860 to 1865
- ItemRU-RNB/531/427-ff. 3-4v - Letter dated August 22, 1860
- ItemRU-RNB/531/427-ff. 11-11v - Letter dated February 28, 1862
- ItemRU-RNB/531/427-ff. 24-25v - Letter dated May 18, 1864
- ItemRU-RNB/531/427-ff. 26-27v - Letter dated June 11, 1864
- ItemRU-RNB/531/427-ff. 28-29v - Letter dated March 4, 1865
- ItemRU-RNB/531/427-ff. 30-30v - Letter dated September 8, 1865
- ItemRU-RNB/531/427-ff. 32-35v - Letter dated November 2, 1865
- 3 more...
