Book  (1981)  Page(s) 413.  
 
The spontaneous sports of 'Tausendschön'. (after Saakov)
1914 Echo ----> 1925 Weiss Echo

Book  (1976)  Page(s) 258.  
 
Echo ---> 'Weiße Echo' 1925, white

Book  (1936)  Page(s) 230.  
 
Echo, Weisse (Pol) Kiese 1925; Sport of Echo; white, short. Sangerhausen