Two prominent features of the data on the charmed-meson-type signal observed at SPEAR are discussed. The predominance of the DD¯* production and the lack of a pronounced K* production signal in D+-->K-π+π+ are explained by using ideas borrowed from analysis of the production and decay of low-mass, uncharmed mesons. The e+e- production cross sections for charmed-meson pairs are treated by a simple vector-meson-dominance picture, and approximate SU(4) symmetry for PPV and PVV couplings leads to a factor-25 enhancement of the DD¯* channel compared to the DD¯ channel. The nonleptonic decay D+-->K-π+π+ is represented by a model with a ΔS=ΔC effective weak "mass-mixing" Hamiltonian, with pole dominance of the external legs, and with Veneziano-amplitude representation of the meson-meson off-shell scattering amplitude. There is no pronounced K* signal in this model, a result which is independent of the choice of satellite terms in the Veneziano amplitude. The potential usefulness of dual-amplitude fits of three-body nonleptonic charmed-meson decays in studies of meson-meson interactions in the 1-2-GeV range is emphasized. The striking charmed-meson mass relations derived from the single-term Veneziano amplitude plus Adler PCAC (partial conservation of axial-vector current) condition (e.g., MD*=2.017+/-0.02 GeV is predicted with MD=1.87+/-0.015 GeV as input) lend support to this kind of approach.