Sorry, I do not have the book. Were your ancestors from Stara Bela?
I know way after your ancestors but family went to family so they could be distant relatives to yours. They arrived thru Ellis Island.
Sasin, Jan Straznice, Moravia 18 1889 1907
Sasin, Jiri Radejov, Czechoslovakia 33 1889 1922
SASIN does list in Ostrava's phone book. http://phone.quick.cz
Distribution of SASIN in Poland:http://www.moikrewni.pl/mapa/kompletny/sasin.htmlwww.surnamenavigator.org