John Barron "KGB" THE SECRET WORK OF SOVIET SECRET AGENTS p.127

Published by Bantam Books, Inc. New York, 1974.

In 1972 the KGB even required the aid of paratroopers to quell nationalistic demonstrations in Lithuania. While such public protests are routine in the West, they are extraordinary in the Soviet Union, and their occurrence is symptomatic of profound strains to which the nationality problem continues to subject Soviet society.