University of patrice lumumba friendship <br/><br/>
Outline of social development  pre capitalist society, primitive clan society slave - owning society feudal society 

 - Moscow  Progress publishers 
 - 206p.; 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Feudal system<br/>Primitive - communal system<br/>Slave system<br/>Social development<br/>Society