"say, m g. "
direct current machine: / m.g. say - 1 ed. - uk : pitman 1986. - "x, 389p.; 23 cm."
0-273-02457-4
621. 313 say
direct current machine: / m.g. say - 1 ed. - uk : pitman 1986. - "x, 389p.; 23 cm."
0-273-02457-4
621. 313 say