"Burma?s current mineral output was small by world standards, although Burma was a producer of some consequence before World War II and still is considered to have a good potential for expansion. Burma?s major minerals included lead and zinc, which came mostly from the famed Bawd-win mine, once the richest lead-zinc lode mine in the world but now mining much lower grade material. Tin and tungsten production was important and came from a variety of small-scale placer and lode mines and few larger Government-owned mines. Burma was one of the few Southeast Asian countries to produce sufficient petroleum and natural gas to meet its domestic needs, and there was a small amount of crude oil exported in 1979. Burma also produced excellent quality jade and other gem minerals. About 67,000 persons, or 0.5% of the active labor force, were employed in mining activities at the beginning of 1978, and 68,000 during 1979. These miners accounted for approximately 1.8% of the net output of goods and services. Burma?s mineral industry was managed primarily by four state-owned corporations. The No. 1 Mining Corp. controlled the lead, zinc, and silver output, which came mostly from its Bawdwin mining operation. It will also run the Monywa copper enterprise. The No. 2 Mining Corp. ran all the major tin and tungsten operations and the Heinze dredging project. The No. 3 Mining Corp. mainly was in charge of the Kalewa and Namma coal mines and the Moulmein and Loikaw antimony mines. The industrial minerals such as barite, limestone, and gypsum were managed by the No. 4 Mining Corp. The No. 3 Corp. was given the responsibility for the planned direct-reduction steel plant in 1979. The Government?s policy in running these mines was that no foreign investment was accepted, and the mines would have no special marketing arrangements with foreign corporations or governments. As a result, very little foreign capital has been available for developing new mines or for modernizing or expanding old ones..."