@book{Dufresne1882,

title = {Schachaufgaben},

author = {Jean Dufresne},

url = {http://www.schachfreunde-brackel.de/wordpress/wp-content/uploads/2020/05/Dufresne-1882-202x300.jpg},

year  = {1882},

date = {1882-01-01},

publisher = {Reclam jun. Leipzig},

keywords = {Aufgaben, Schachgeschichte, Vereinsheim},

pubstate = {published},

tppubtype = {book}

}