Latvia
An industrialized region with strong agriculture. In the 1970s and 1980s, industry (mechanical engineering, electrical engineering, radio electronics, etc.) accounted for about 42% of the generated national income; about 24% – agriculture, 7% – transport and communications, 8% – construction (1984). Electricity production – 5 billion kWh (1985). The operational length of railway tracks is 2384 km (1984), of which 248 km are electrified, 27.6 thousand km are motor roads (1984), including 19 thousand km with hard surface. The Latvian SSR performed about 1/6 of all sea transportations of the CCCP; its main ports are Riga, Ventspils, Liepaja.
The Latvian SSR imported oil and oil products from Belarus, the Volga region and Western Siberia, coal and metal from Ukraine, tractors and trucks from Belarus, cotton, wool, leather from Central Asia and Kazakhstan. In turn, the LSSR supplied radio receivers, automatic telephone exchanges, minibuses, carriages, washing machines, products of the light and food industries, etc. to other union republics. Industrial products of the LSSR were exported to more than 100 countries. In the production of national income per capita, Latvia occupied one of the leading places among the union republics. In terms of production per capita, the LSSR ranked 1st among the Union republics in the production of mainline cars, tram cars, diesel engines and diesel generators, automatic telephone exchanges and telephones, refrigeration units, plywood, slate, woolen and linen fabrics, outerwear, radios, household washing machines, mopeds, as well as in the scope of work of consumer services and passenger transportation by rail (1972).
The map is not to scale, the boundaries are shifted, of course I do not pretend to be realistic. Report all problems in the comments!