Milton A. Rothman was best known to generations of science-fiction readers for a single classic story written at age 19: «Heavy Planet,» published under the byline of «Lee Gregor» in 'Astounding Science Fiction' in 1939 at the beginning of the Golden Age and kept in print for decades in the classic anthology 'Adventures in Time and Space'.<P> He was also a pioneer of early fandom, a founder of the Philadelphia Science Fiction Society, a fanzine publisher, and a World...