greek round shields?

[DR_Reham]

I ASK ABOUT ROUND SHIELDS IN BRONZE AGE , WAS IT REAALY FOUND BEFORE LH III ? I WAS READ THAT IN 
http://www.salimbeti.com/micenei/shields2.htm

 BUT I can,t find any details about copper shield from Priam treasure ,,  and also i want to find books talk in details about this rounded shields , and last how can i found the biblography which the site http://www.salimbeti.com/micenei/shields2.htm Depends on. 

thanks in advance

reham