Blocksma, Mary. <br/><br/>
Necessary numbers :  An everyday guide to sizes, measures, and more / 
 Uncle John's presents 
Mary Blocksma. 
 - San Diego, Calif. :  Portable Press,  2002. 
 - xi, 292 p. :  ill. 
 - 530 .
<br/><br/> Rev. ed. of: Reading the numbers. 1989. 
<br/><br/>Includes bibliographical references (p. 277-284) and index. 
<br/><br/><label>ISBN: </label>1571458662 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Weights and measures.<br/>Weights and measures--United States.
<br/><br/><label>Dewey Class. No.: </label>530