Draught Beer Quality Manual Paperback by Technical Committee of the Brewers Association
From the book description, check product page for current description, price and availability:
Delicious draught beer is a true delight, but the key challenge is ensuring that beer arrives to the consumer with all the freshness and flavor the brewer intended. In an ongoing effort to improve the quality of beer served at retail, the Brewers Association (BA) Draught Beer Quality Committee introduces the updated and revised fourth edition of the Draught Beer Quality Manual.
PDF Version: draughtquality.org offers a free PDF download of an older version of this book