From Paul Wang,
So far, the best reference for the above two issues can be found on pages 20 and 22 respectively from the book entitled “Get Talking Chinese”, by Dorling Kindersley. It is no clear to me who are the authors, but the back cover thanks Katharine Carruthers & Yu Bin. www.dk.com ISBN 978-0-7566-2902-1
Students wish to learn Chinese usually do not have a great source to go to in order to find out precisely how many basic Strokes the Chinese language has? This book also shows the thickness at different positions within a stroke. The reason why these are important is due to the CWP, Computing With Perception and the artistic build in characteristic of Chinese language.
May be there is a better reference, at least for now, in my opinion, this reference is clearly the best!Hence we do recommend to any potential student.