Wikidata entity: Q823935
P569 (date of birth): 1875-01-01 | P570 (date of death): 1948-10-19
| P512 | academic degree | ... | Q17281125 (Doctor in Engineering) | Doctor in Engineering |
| P373 | Commons category | String | Ludwig Martens | ??? |
| P27 | country of citizenship | ... | Q15180 (Soviet Union) | Soviet Union |
| P27 | country of citizenship | ... | Q34266 (Russian Empire) | Russian Empire |
| P27 | country of citizenship | ... | Q43287 (German Empire) | German Empire |
| P1343 | described by source | ... | Q17378135 (Great Soviet Encyclopedia (1969–1978)) | Great Soviet Encyclopedia (1969–1978) |
| P69 | educated at | ... | Q51985 (Technische Universität Berlin) | Technische Universität Berlin |
| P69 | educated at | ... | Q16669119 (Kursk Real School) | Kursk Real School |
| P69 | educated at | ... | Q2654435 (Saint Petersburg State Institute of Technology) | Saint Petersburg State Institute of Technology |
| P734 | family name | ... | Q16876487 (Martens) | Martens |
| P735 | given name | ... | Q14159020 (???) | ??? |
| P31 | instance of | ... | Q5 (human) | human |
| P1412 | languages spoken, written or signed | ... | Q150 (French) | French |
| P1412 | languages spoken, written or signed | ... | Q188 (German) | German |
| P1412 | languages spoken, written or signed | ... | Q1860 (English) | English |
| P1412 | languages spoken, written or signed | ... | Q7737 (Russian) | Russian |
| P463 | member of | ... | Q124649913 (All-Union Society of Old Bolsheviks) | All-Union Society of Old Bolsheviks |
| P102 | member of political party | ... | Q49768 (Social Democratic Party of Germany) | Social Democratic Party of Germany |
| P102 | member of political party | ... | Q79854 (Communist Party of the Soviet Union) | Communist Party of the Soviet Union |
| P102 | member of political party | ... | Q204911 (Russian Social Democratic Labour Party) | Russian Social Democratic Labour Party |
| P102 | member of political party | ... | Q1723321 (League of Struggle for the Emancipation of the Working Class) | League of Struggle for the Emancipation of the Working Class |
| P1559 | name in native language | Monolingualtext | Ludwig Christian Alexander Karl Martens | ??? |
| P106 | occupation | ... | Q81096 (engineer) | engineer |
| P106 | occupation | ... | Q82955 (politician) | politician |
| P106 | occupation | ... | Q193391 (diplomat) | diplomat |
| P19 | place of birth | ... | Q706857 (Bakhmut) | Bakhmut |
| P119 | place of burial | ... | Q208175 (Novodevichy Cemetery) | Novodevichy Cemetery |
| P20 | place of death | ... | Q649 (Moscow) | Moscow |
| P39 | position held | ... | Q40032487 (Soviet Ambassador to the United States) | Soviet Ambassador to the United States |
| P21 | sex or gender | ... | Q6581097 (male) | male |
| P937 | work location | ... | Q60 (New York City) | New York City |
| P937 | work location | ... | Q64 (Berlin) | Berlin |
| P937 | work location | ... | Q145 (United Kingdom) | United Kingdom |
| P937 | work location | ... | Q649 (Moscow) | Moscow |
| P937 | work location | ... | Q656 (Saint Petersburg) | Saint Petersburg |
| P10033 | Biografija.ru ID | martens-ljudvig-karlovich |
| P11496 | CiNii Research ID | 1140563741804801664 |
| P13834 | Encyclopedia of Marxism ID | people/comintern/index.htm#Martens-Ludwig |
| P6878 | Erik Amburger database ID | 31855 |
| P8168 | FactGrid item ID | Q812611 |
| P535 | Find a Grave memorial ID | 112506807 |
| P646 | Freebase ID | /m/03h5mcy |
| P227 | GND ID | 1079732632 |
| P269 | IdRef ID | 16862995X |
| P213 | ISNI | 0000000397497588 |
| P244 | Library of Congress authority ID | nr2003027499 |
| P271 | NACSIS-CAT author ID | DA15646385 |
| P8189 | National Library of Israel J9U ID | 987009912171405171 |
| P1368 | National Library of Latvia ID | 000125894 |
| P7699 | National Library of Lithuania ID | LNB:CRKl;=Bi |
| P7293 | National Library of Poland MMS ID | 9810600062605606 |
| P1006 | Nationale Thesaurus voor Auteursnamen ID | 135663687 |
| P1207 | NUKAT ID | n2006094481 |
| P3430 | SNAC ARK ID | w6gc1qqf |
| P214 | VIAF cluster ID | 25721251 |
| P10832 | WorldCat Entities ID | E39PBJtX3DyX8cBt8jxGG9qhHC |
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