Analysis of information sources in references of the Wikipedia article "热气球" in Chinese language version.
On Sept. 19, 1785 a balloon launched a sheep, a cock, and a duck to an altitude of 1500 ft and returned them to earth unharmed from the world's first successful air-passenger flight.
On Sept. 19, 1785 a balloon launched a sheep, a cock, and a duck to an altitude of 1500 ft and returned them to earth unharmed from the world's first successful air-passenger flight.
