Johnson, George. <br/><br/>
Miss Leavitt's stars :  the untold story of the woman who discovered how to measure the universe / 
George Johnson. 
 - 1st  ed. 
 - London :  W. W. Norton,  2005. 
 - xiii, 162  p. 
<br/><br/><label>ISBN: </label>0393328562 : 
<br/><br/><label>Subjects--Personal Names: </label><br/>Leavitt, Henrietta Swan, 1869-1921. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy--History.<br/>Astronomical photometry.