| The Encyclopedia of World History. 2001. |
| 1976, May 28 | |
| The USSR and the U.S. signed the Treaty on Underground Nuclear Explosions. | 1 |
| 1977, June 16 | |
| Brezhnev replaced N. Podgorny as chairman of the Presidium of the Supreme Soviet, becoming the first Soviet leader to act as both party leader and head of state. | 2 |
| Oct. 7 | |
| A new constitution was adopted to replace the Stalin constitution of 1936; the Communist Party was specifically named as ruling party of the Soviet Union. | 3 |
| The Encyclopedia of World History, Sixth edition. Peter N. Stearns, general editor. Copyright © 2001 by Houghton Mifflin Company. Maps by Mary Reilly, copyright © 2001 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved. | |
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