There's no sign that I can see of a birth for that couple during 1928 in Dublin. The BMD Index includes mother's maiden name after mid 1927, and searching for any O'Dwyer/Dwyer & Bourke/Burke births registered between 1927 and 1935 shows just four matches, plus some duplicates - and they are in Tipperary, Limerick and Galway.
see :
O'Dwyer/Bourke births Births before mid 1927 do not include mothers maiden surname on the online index, which make the search more difficult. There are quite a few Kevin O'Dwyer births listed, and to check if the parents match you would have to purchase the certs. see :
Kevin O'Dwyer births - 1920-1935'Dublin' can mean the city, suburbs or county, and the registration districts which cover the area are : Dublin North, Dublin South, Rathdown and Balrothery, plus small sections in Dunshaughlin, Naas and Celbridge districts. Note Rathdown also includes a large area in Co. Wicklow
S.