{"category":null,"date":{"calendar":null,"day":6,"day_url":"https://kogda.com/6-marta","month":3,"text":"6 марта 1850 года","year":1850,"year_url":"https://kogda.com/1850"},"id":122164,"kind":"birth","library":[],"license":"Тексты: Русская Википедия, CC BY-SA 4.0. Люди и места: Wikidata, CC0.","mentions":[],"people":[{"name":"Адольф Мартенс","slug":"adolf-martens","url":"https://kogda.com/p/adolf-martens"}],"places":[],"related":[],"slug":"rozhdenie-adolf-martens","source":{"license":"CC BY-SA 4.0","name":"Русская Википедия","url":"https://ru.wikipedia.org/wiki/6_марта"},"summary":null,"text":"немецкий металлограф; пионер в области металлографии стали и соответствующих методик исследований","title":"Адольф Мартенс","url":"https://kogda.com/e/rozhdenie-adolf-martens","weight":19}