Schmucker, Samuel Christian,  b. 1860 <br/><br/>
Heredity and parenthood / 
by Samuel Christian Schmucker 
 - New York :  Macmillan,  1929 
 - x, 322 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heredity, Human<br/>Human reproduction<br/>Eugenics<br/>Sex instruction