@font-face {
    font-family: 'textbook';
    src: local('textbook');
    src: url('i-font_face_textbook.woff'),
         url('i-font_face_textbook.ttf');
}

@font-face {
    font-family: 'rouble';
    src: local('rouble');
    src: url('rouble.otf');
}

.i-font_face_textbook
{
    font-family: 'textbook';
}