GPO has cataloged 54 online titles from a declassified CIA numbered
series known as the CAESAR series. The Director of the CIA established
Project CAESAR in 1952; and this series of working papers was published
from 1953-1972. The purpose of Project CAESAR was to study the members
of, and events affecting the Soviet leadership hierarchy. The collection
focuses on internal policies and politics.
See the CAESAR collection on the CIA website