Primary sources may be objects (artifacts, tools, weapons, inventions, fashions, uniforms), images (photographs, film, video), audio (oral histories, music, interviews, speeches,) or documents (books, letters, journals, diaries).
A primary source gives you direct access to the subject of your research. Secondary sources provide second-hand information and commentary from other researchers. Examples include journal articles, reviews, and academic books. A secondary source describes, interprets, or synthesizes primary sources.
Jews were forced into the ghettos were they kept separate and isolated from everyone else. They weren’t permitted most things that Germans were and lived in harsh conditions.