Вaлескaлн, П. И. Valeskaln, P. I. <br/><br/>
Revolyutsionnyy demokrat Petr Davydovich Ballod :  materyaly k biografii / 
P. I. Valeskaln. 
 - Riga :  Izd. Akademii Nauk Latviiskoi SSR,  1957. 
 - 297 p. : 
<br/><br/><label>ISBN: </label>RUSSIAN21685 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Revolutionaries
<br/><br/><label>Dewey Class. No.: </label>923.247  / Re