First released on November 13, 1973, in local "Egyptian Theater" in Delta, and subsequently aired on several USA TV channels, The Great Dinosaur Discovery was originally planned to be trimmed to about 30 minutes for educational use. Indeed, to obtain a shortened educational version, the full-length documentary was reduced to a 24-minute-long mini-film which started airing on American television channels throughout the USA as of 1976.
The Great Dinosaur Discovery, initially released on November 13, 1973, in a local theater in Delta, and subsequently aired on several USA TV channels, was originally intended to be about 30 minutes long for educational purposes.  A shorter version, a 24-minute mini-film, was created for television broadcast starting in 1976.