Discover the fascinating world of science and technology with this April 1985 edition of Scientific American magazine. Published in English, this issue covers a range of topics including Third World Cities and the Parson Steam Turbine. It's a great addition to any book or magazine collection and perfect for anyone interested in the latest scientific breakthroughs.

With its informative articles and stunning visuals, this magazine is a must-read for science enthusiasts and professionals alike. Whether you're interested in the latest research or just looking to expand your knowledge, this issue of Scientific American has something for everyone. So why wait? Add it to your collection today!