- 09:25, 13 April 2021 diff hist +103 ISBN-13 (P91) Added [en] alias: International Standard Book Number
- 09:25, 13 April 2021 diff hist +156 ISBN-13 (P91) Added [hu] description: 13 jegyű azonosítószám a könyvek és egyéb monografikus jellegű művek nyilvántartására
- 09:25, 13 April 2021 diff hist +106 ISBN-13 (P91) Added [en] description: Identifier for a book (edition), thirteen digit
- 09:25, 13 April 2021 diff hist +65 ISBN-13 (P91) Added [hu] label: ISBN-13
- 09:15, 13 April 2021 diff hist +380 ISBN-10 (P92) Created claim: formatter URL (P20): https://wikidata.org/wiki/Special:BookSources/$1
- 09:10, 13 April 2021 diff hist +103 ISBN-10 (P92) Added [hu] alias: International Standard Book Number
- 09:09, 13 April 2021 diff hist +103 ISBN-10 (P92) Added [en] alias: International Standard Book Number
- 09:09, 13 April 2021 diff hist +132 ISBN-10 (P92) Added [hu] description: 10 jegyű azonosítószám a 2007. január 1. előtt kiadott könyveknél
- 09:09, 13 April 2021 diff hist +147 ISBN-10 (P92) Added [en] description: Former identifier for a book (edition), ten digits. Used for all publications up to 2006
- 09:09, 13 April 2021 diff hist +65 ISBN-10 (P92) Added [hu] label: ISBN-10
- 09:05, 13 April 2021 diff hist +234 N ISBN-10 (P92) Created a new Property: ISBN-10
- 08:37, 13 April 2021 diff hist +384 ISBN-13 (P91) Created claim: formatter URL (P20): https://www.wikidata.org/wiki/Special:BookSources/$1
- 08:34, 13 April 2021 diff hist +234 N ISBN-13 (P91) Created a new Property: ISBN-13
- 07:26, 5 April 2021 diff hist -403 Jacobus Piso (Q143) Removed claim: acquaintanceship (P87): Desiderius Erasmus (Q1362)
- 08:40, 30 March 2021 diff hist -4 Main Page editing the project's description Tag: Visual edit
- 15:45, 29 March 2021 diff hist +1,083 Main Page Adding a brief summary about the project. Tag: Visual edit
- 19:56, 22 March 2021 diff hist +71 secondary literature (P1) Added [hu] label: szakirodalom
- 19:56, 22 March 2021 diff hist +239 N secondary literature (P1) Created a new Property: literature
- 10:36, 20 March 2021 diff hist +216 N Lymbus (Q1) Created a new Item: Lymbus
- 10:33, 20 March 2021 diff hist -416 Irodalomtörténeti Közlemények (Q4005) Removed claim: instance of (P2): scientific journal (Q385)