Rift Valley fever :  an emerging human and animal problem 

 - Geneva:  World Health Organization;  1982 
 - 69 p. 
 - WHO offset publication No.63, 64 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rift Valley fever<br/>Oral contraceptives<br/>Viral diseases-public health
<br/><br/><label>Dewey Class. No.: </label>614.58  / WOR