Որոնման արդյունքները - D. Appleton - Century

Plane Trigonometry ; a textbook for schools and colleges ‌ Brink, Raymond W.

“…D. Appleton - Century…”

The Rhetoric of Aristotle : An expanded translation whith supplementary examples for students of conposition and public speaking ‌ Cooper, Lane

“…D. Appleton-Century Company…”