sorry in the search I saved some Guercios, 1910 census, and I posted one but the Rosa Randazzo is of the other Joseph Guercio( that I found and born abt in same year); so the 1910 census of Joseph Guercio son of Joseph Guercio and Rosa Randazzo is:
1910 United States Federal Census
about Joseph Guercio Name: Joseph Guercio
Age in 1910: 9/12
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Estimated Birth Year: abt 1910
[1910]
Birthplace: New York
Relation to Head of House: Son
Father's name: Joseph Guercio
Father's Birth Place: Italy
Mother's name: Rosie Guercio
Mother's Birth Place: Italy
Home in 1910: Manhattan Ward 12, New York, New York
Marital Status: Single
Race: White
Gender: Male
Neighbors: View others on page
Household Members: Name Age
Joseph Guercio 45
Rosie Guercio 39
Salvatore Guercio 13
Frank Guercio 11
Annie Guercio 7
Bessie Guercio 5
Thomas Guercio 3
Laurence Guercio 2
Joseph Guercio 9/12
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abt the column you can see in column 15..
however in the data that you provided are some discrepancies and I search but nobody sure results abt the people that you are searching for...