Not sure from your query if you are researching in Italy or the US, but here is something you can do.
Go to a Family History Center near you and rent the film with the civil records from Sammichele di Bari
for the years you are looking for.
You can find a center near you.... familysearch.org/locations
Also, From some manifests.....Is this the family??? John (b abt 1865) married to Anna Urbano with ties to Arkansas. Is Spinella a family name?
Were the sons born in the late 1890's? More information would help.