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F and D couplings of baryons and mesons are shown to arise naturally with a simple extension of the gauge formalism to a (S{U₃U₃) }₋ (S{U₃U₃) }ₑ group structure. In its general formulation the theory needs parity doubltets of (0+) and (0-) ninefolds. It admits of (two types of F and D coupled) (1+) and (1-) vector and axial-vector meson multiplets, a specially attractive combination of currents which emerges from the formalism being an equal mixture of vector F with axial-vector D the case of (S{U₃) }₋ (S{U₃) }ₑ. The theory also admits an approximate (Bronzan-Low) type of quantum number.
Salam et al. (Mon,) studied this question.