It was the Turing Award Lecture in 1972. Printed in "Classics in Software Engineering" by Yourdon Press, 1979, ISBN 0917072146

Here are some of the previous submissions here on HN:

http://news.ycombinator.com/item?id=86288

http://news.ycombinator.com/item?id=109724

http://news.ycombinator.com/item?id=126638

http://news.ycombinator.com/item?id=135111

http://news.ycombinator.com/item?id=156505

http://news.ycombinator.com/item?id=449806

http://news.ycombinator.com/item?id=1179277

http://news.ycombinator.com/item?id=1649246

http://news.ycombinator.com/item?id=1672262

http://news.ycombinator.com/item?id=1799296

http://news.ycombinator.com/item?id=1894784

http://news.ycombinator.com/item?id=2011732

So many postings, so little discussion.