Gould, Ralph Edgar,  1886- <br/><br/>
Standard time throughout the world. 

 - [4th edition.]. 
 - ii, 30 pages  illustrations, map  24 cm 
 - National Bureau of Standards circular  496 .
 - National Bureau of Standards circular ;  496. .
<br/><br/> "Supersedes Circular 406." 
<br/><br/>"Selected references": pages 29-30. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Time--Systems and standards.<br/>Time--Systems and standards.
<br/><br/><label>Subjects--Index Terms: </label>Global Standards Timezones Time timekeeping 
<br/><br/><label>Gov. Doc. Class. No.: </label>C 13.4:496