Nagata, Masayoshi <br/><br/>
On Flat Extensions of a Ring 
Masayoshi Nagata 
 - Montreal  Les presses de l' Universite de Montreal  1979 
 - 54 p  ill  26 cm 
<br/><br/> Contine bibliografie 
<br/><br/><label>ISBN: </label>84050182x