A New System of Arithmetic, On an Improved Plan, Embracing the Rules of Three .: And All Proportional Questions in One Rule Applicable to the Whole, the Process Greatly Simplified and Abridged
Автор: Charles Guilford Burnham, 332 стр., издатель: "Книга по Требованию", ISBN: 978-5-8793-2507-2



5 из 5, 10 голос(-ов).