Title: Vzaimnii͡a︡t obmen na nauchno-tekhnicheski i proizvodstven opit--vazhna predpostavka za zadŭlbochavane na prot͡s︡esite na sblizhavane i integrat͡s︡ii͡a︡ mezhdu NRB i SSSR
Subjects: Literary and scientific Exchanges, Relations, Exchange of publications
Places: Bulgaria, Soviet Union