Статья по строительству первых крепостей в Южном Зауралье.
К сожалению, скан сделан с небольшим разрешением, что сказывается, особенно для иллюстративного материала. Но текст читаемый...
https://www.academia.edu/5576718/%D0%9E_%D1%84%D0%BE%D1%80%D1%82%D0%B8%D1%84%D0%B8%D0%BA%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D1%85_%D1%81%D0%BE%D0%BE%D1%80%D1%83%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F%D1%85_%D0%AE%D0%B6%D0%BD%D0%BE%D0%B3%D0%BE_%D0%97%D0%B0%D1%83%D1%80%D0%B0%D0%BB%D1%8C%D1%8F_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4%D0%B0_%D0%91%D0%B0%D1%88%D0%BA%D0%B8%D1%80%D1%81%D0%BA%D0%BE%D0%B3%D0%BE_%D0%B2%D0%BE%D1%81%D1%81%D1%82%D0%B0%D0%BD%D0%B8%D1%8F_1735-1740_%D0%B3%D0%B3
https://www.academia.edu/5576718/%D0%9E_%D1%84%D0%BE%D1%80%D1%82%D0%B8%D1%84%D0%B8%D0%BA%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D1%85_%D1%81%D0%BE%D0%BE%D1%80%D1%83%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F%D1%85_%D0%AE%D0%B6%D0%BD%D0%BE%D0%B3%D0%BE_%D0%97%D0%B0%D1%83%D1%80%D0%B0%D0%BB%D1%8C%D1%8F_%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4%D0%B0_%D0%91%D0%B0%D1%88%D0%BA%D0%B8%D1%80%D1%81%D0%BA%D0%BE%D0%B3%D0%BE_%D0%B2%D0%BE%D1%81%D1%81%D1%82%D0%B0%D0%BD%D0%B8%D1%8F_1735-1740_%D0%B3%D0%B3