1979 heat map overlaid on top of maps of Pakistani-bound emigration (and immigration) from 1979-1985. Data from Abdul Hamid Malik, Impelled Afghan Migration to Pakistan, 1978-1984 (PhD Dissertation: University of Peshawar, 1985)
Wikimedia Commons image of the Soviet Union and client states, c. 1979. From: http://upload.wikimedia.org/wikipedia/commons/thumb/5/54/Sino-Soviet_split_1980.svg/940px-Sino-Soviet_split_1980.svg.png