Natural science an integrated couré frr ćerrd ́. c 7 prepared by the Science Textbook Group of the Science Foundation for Physics within the University of Sydney; Chairman of the Australian project Harry Messel]; authors & editors of the United Kingdom project Herman Bondi [and others]
Messel, Henry.
Bond, Hermann,Sir,1919-
Hawkins, Lacey.
University of Sydney.Science Textbook Group.
Oxford Pergamon,
1968
Science.