Tài liệu tham khảo WikiPedia: Cối tự hành Reihenwerfer //www.worldcat.org/oclc/2067459 http://www.dws-xip.pl/encyklopedia/vehmcg-gr/ https://www.flamesofwar.com/hobby.aspx?art_id=614 https://archive.org/details/mortarsrockets0000cham...
