List available for Ten, Fifteen Serial # Years?

Hi. Does anyone know if there is a book or list / manual available that breaks down the serial numbers and years for the Caterpillar 10, 15, 20 Twenty and maybe other models? I have the Antique Tractor Guide and Cat Pocket Guide but they don't break down each year. I was thinking there must be a list somewhere as I've seen other owners post their Cats as 1929, 1931, etc.. Thanks!

Here you Its right here on this site Go to website then to store then to books and its right http://www.acmoc.org/

Thanks Willie! Just found it now at the Store link on the main page by the top for the Serial Number Reference Manual and ordered it. Put the link below for any others too in case. Thanks again. -Robert

http://www.acmoc.org/index.php?option=com_oscommerce&osMod=product_info&Itemid=60&catID=14&products_id=53