Pearl, Raymond,    1879- <br/><br/>
Introduction to medical biometry and statistics /  
by Raymond Pear l. 
 - 2d ed., rev. and enl. 
 - Philadelphia ;    London :    W. B. Saunders ,    1930. 
 - 459 p. :    ill., diagrs. ;    24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Medical statistics<br/> Vital Statistics