Mann, R.J. Lessons in general knowledge : an elementary reading book intended to serve as a familiar and attractive introduction to the principles of natural science / by Robert James Mann; R.J. Mann .— New edition .— : Longman Green Longman and Roberts, 1860 .— 755 с. — Lang: eng .— URL: https://rucont.ru/efd/130727 (дата обращения: 26.06.2024)