Maxima and Minima Without Calculus by Niven, Ivan

Mathematics of Choice: Or, How to Count Without Counting by Ivan Morton Niven

Geometric Inequalities by Nicholas D. Kazarinoff 1961 SC / 1st Printing

A First Course In Calculus by R. E. Johnson & F. L. Kiokemeister 1969 HC VTG

Mathematical Methods for Physicists, 7th International ed. – Brand New

The Calculus: A Genetic Approach by Toeplitz, Otto, Editor Gottfried kothe

4-Books Popular Lectures in Mathematics 1974 Formin, Sobol, Bakel'man, Uspenskii

Mathematics of Choice: How to Count Without Counting by Ivan Niven - MAA