Proposal to study the boson mass spectrum, in the mass region 2.0 - 3.0 GeV, with final decay products p$\overline{p} \pi^{-}, K^{+} K^{-} \pi^{-} and \pi^{+} \pi^{-} \pi^{-} + n\pi^{0}$ (n $\geq$ 0), using the CERN-ETH-IC spark chamber equipment triggered with a proton time of flight missing mass trigger.

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