Hi Lilberti,
I came across a subscription site for the Lethbridge Herald newspaper 1905-1955 which may have information about your family.
http://lethbridgeherald.newspaperarchive.com/AdvanceSearch.aspxYou didn't say whether you had any information from passenger lists, so my apologies if you already have this.
On Ancestry, I found a Guilia Dallape, age 21, on a New York Passenger list, arriving New York on October 14, 1913 aboard the Rochambeau. Perhaps this is your ancestor?
If you don't have access to Ancestry, you can view the manifest on the Ellis Island site. It is free to use but you must register. On the Ellis Island site, the name is transcribed as Guilia Dallope. The manifest is 2 pages so remember to look at both. It gives the name of her sister that she is going to in Diamond City, Alberta which is a hamlet 8 miles north of Lethbridge.
If you search Giacomo Berteotti on the Ellis Island site, you will find him arriving New York on May 16, 1909 aboard the SS New York. He's 26 years old, seems to be travelling with a family member and his final destination is Lethbridge, Alberta. I find this manifest difficult to read.
Cheers,
Susan
Edited to include the link to Ellis Island site:
http://www.ellisisland.org/default.asp