Exercise with three unknowns
Genre :
Casting :
Leonhard Merzin , Vladimir Gerasimov , Rostislav Yankovskiy , Olga Prokhorova , Boris Shcherbakov , Viktor Proskurin , Yuri Astafyev , Tamara Chernova , Aleksandr Vergunov , Mikhail Petrov , Galina Makarova , Vera Titova , Nadezhda Sementsova , Boris Vladomirsky , Pavel Vinnik , Anatoli Stolbov ,