# Connected sum of a torus and a real projective plane

My question is really basic. I was reading on the Massey's Book of algebraic topology on the connected sum of the torus and real projective plane, I felt a little confused his explanation. Someone can explain to me Or at least give a reference where I can find this calculation?

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 Calculation of what? – Chris Eagle Jan 20 '12 at 23:23 Please summarize what Massey did in his book. – Erno Nemecsek Jan 22 '12 at 13:52