The Soviet union republic created on 2 August 1940 from central Bessarabia (annexed from Romania weeks earlier) joined to a strip of the former Moldavian ASSR east of the Dniester.
Declared sovereignty in 1990 and became independent Moldova on 27 August 1991.
The atlas holds 2 border frames for Moldavian Soviet Socialist Republic — the shape you scrub through changes in 1940 · 1944.
The standard English history of Bessarabia/Moldova including the MSSR's creation and Soviet era. (Open Library verified: Charles King, 2000)