Open University, Technology Foundation Course Team. (1971). Using letters instead of numbers. Unit 4 by Michael Hussey. Open Uty press.
Chicago Edition CitationOpen University, Technology Foundation Course Team. Using Letters Instead of Numbers. Unit 4 by Michael Hussey. Open Uty press, 1971.
MLA Edition CitationOpen University, Technology Foundation Course Team. Using Letters Instead of Numbers. Unit 4 by Michael Hussey. Open Uty press, 1971.
Warning: These citations may not always be 100% accurate.