Kulin, H E <br/><br/>
The onset of sperm production in pubertal boys. Relationship to gonadotropin excretion.  [electronic resource] 

 -  American journal of diseases of children (1960)  Feb 1989 
 - 190-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-922X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Child<br/>Follicle Stimulating Hormone--urine<br/>Humans<br/>Luteinizing Hormone--urine<br/>Male<br/>Puberty<br/>Spermatogenesis<br/>Spermatozoa<br/>Urine