| 申请人 |
* LENINGRADSKY GOSUDARSTVENNY PEDAGOGICHESKY INSTITUT IMENI A I GERTSENA |
发明人 |
VLADIMIR KHATSKELEVICH * KHAVINSON;VYACHESLAV GRIGORIEVICH * MOROZOV;NINA DMITRIEVNA * SIDOROVA;VLADIMIR LEONIDOVICH * KONSTANTINOV;OLEG VASILIEVICH * CHAIKA;VERA ALEXEEVNA * IVANOVA |
