The content acknowledged below is Proprietary (see licence.) and is used under
Grateful acknowledgement is made to the following sources for permission to reproduce material in this course:
The content acknowledged below is Proprietary and is used under licence.
This extract is taken from K202 © 2000 The Open University
Section 2.1 Courtesy of William Moult;
Section 2.1 Courtesy of Karen Bayliss;
Section 2.2 Courtesy of William Moult;
Section 2.2 Courtesy of William Moult.
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