Following former non-relativistic calculations on mesons, the authors fit a phenomenological ss potential of the square-root and linear type to the phi and phi ' masses and obtain the mass spectrum of the other states and decay widths. They notice that a square-root type of qq potential can be taken as flavour independent if a Coulombic short-distance interaction and spin-spin, spin-orbit terms are considered. This potential is applied to toponium and they also use it to calculate the mass spectra of baryons, made up of three identical quarks. The three-body Schrodinger equation is solved through a variational technique where the trial wavefunction is expanded in terms of a harmonic oscillator basis. Comparisons with experimental data and other calculations are presented.