  In this paper we compute the multiple cover Gromov-Witten integrals (analog
of the Aspinwall-Morrison formula) for the unramified compactification of the
moduli space of stable maps to an embedded $\PO$ in a Calabi-Yau threefold $X$
with the normal bundle $\mathcal{O}_{\PO}(-1) \bigoplus \mathcal{O}_{\PO}(-1)$.
