Open AccessThe Technological Actuality of Human Aerospace Principle and the Possible Fact of UFO
Author(s) -
王 思潮
Publication year - 2014
Publication title -
guo ji hang kong hang tian ke xue
Language(s) - English
Resource type - Journals
eISSN - 2330-474X
pISSN - 2330-4758
DOI - 10.12677/jast.2014.24007
Subject(s) - aerospace , engineering , engineering ethics , aeronautics , aerospace engineering