OBSERVATION OF A 0++(750) GLUONIUM CANDIDATE IN MEASUREMENTS OF πN ↑ →π+π-N ON POLARIZED TARGET AT 6, 12 AND 17.2 GeV/c M. Svec J. Phys. Colloques, 46 C2 (1985) C2-281-C2-284 DOI: 10.1051/jphyscol:1985232