PLS7187533: Rubber factory, rubber plantation, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187539: Crepe rubber on drum, rubber factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187545: Coagulation tanks, Rubber factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187547: Laying out sheets of rubber, rubber factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187557: Sorting tea at tea factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187560: Tea factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187563: Tea pickers, tea plantation, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187567: Tea pickers, tea plantation, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187568: Tea pickers, tea plantation, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187573: Weighing tea after rolling at tea factory, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187578: Siving for gems in Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187583: Pineapple seller in market, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187584: Pineapple seller in market, Colombo, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187591: Fishing off the coast of Sri Lanka, Sri Lanka, 1972 (photo) / Bridgeman Images

PLS7187599: Loading iron ore into lighters, Goa, India, 1967 (photo) / Bridgeman Images

PLS7187600: The Qutb Minar, Delhi, India, 1967 (photo) / Bridgeman Images

PLS7187605: Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187606: Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187610: Loading pig iron, Calcutta, India, 1967 (photo) / Bridgeman Images

PLS7187613: Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187625: Filling mould with molten steel, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187626: Dock workers loading pig iron, Calcutta, India, 1967 (photo) / Bridgeman Images

PLS7187627: Railway tracks, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187628: Railway tracks, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187629: Red hot ingots weighing 7 tons, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187632: Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187635: Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187637: Producing railway wheels, Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187641: Producing railway wheels, Durgapur Steelworks, West Bengal, India, 1967 (photo) / Bridgeman Images

PLS7187649: Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187660: Flattened steel slabs, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187661: Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187669: Sikh worker welding oil pipes, Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187671: Rourkela Steel Plant, Odisha, India, 1967 (photo) / Bridgeman Images

PLS7187673: Bhilai Steel Plant, Bhilai, Chhattisgarh, india, 1967 (photo) / Bridgeman Images

PLS7187675: Railway tracks, Bhilai Steel Plant, Bhilai, Chhattisgarh, india, 1967 (photo) / Bridgeman Images