@font-face {
    font-family: 'barcode';
    src: url('fonts/LibreBarcode39.woff2') format('woff2'),
         url('fonts/LibreBarcode39.woff') format('woff'),
         url('fonts/LibreBarcode39.ttf')  format('truetype'),
         url('fonts/LibreBarcode39.svg#LibreBarcode39') format('svg');
}