Has six maps: precious metals and mercury; beryl, collumbite-tantalite, selenium and zircon; diamonds, abrasive and insulating substances; natural and synthetic rubber and tires; sulpher, phosphastes, potash salts and saltpeter; supheric acid, nitrogenous fertilizers, caustic soda and plastics.
note
Has six maps: precious metals and mercury; beryl, collumbite-tantalite, selenium and zircon; diamonds, abrasive and insulating substances; natural and synthetic rubber and tires; sulpher, phosphastes, potash salts and saltpeter; supheric acid, nitrogenous fertilizers, caustic soda and plastics.
Note
false