World Health Organization Regional Office for Europe, 1978
Buku Teks
The Institution of Mechanical Engineers, 1993
Buku Teks
Wood, Janet, author
Institution of Engineering and Technology, 2007
eBooks
by Paul R. Ehrlich [and others]
W.W. Norton, 1984
Buku Teks
Margulova, T.
Buku Teks