Johnson, P.S.
The economics of invention and innovation: with a case study of the development of the hovercraft by P.S. Johnson - London Martin Robertson 1975 - 329p.
Ground-effect machines.
Technological innovations
T25084 J63
The economics of invention and innovation: with a case study of the development of the hovercraft by P.S. Johnson - London Martin Robertson 1975 - 329p.
Ground-effect machines.
Technological innovations
T25084 J63
