Modern Living: Think Metric, Time Magazine, 9 giugno 1975. URL consultato il 15 giugno 2010 (archiviato dall'url originale il 22 gennaio 2011).
«Meanwhile, the metricization of America is already taking place. Individual federal agencies, school systems, states and industries, as well as radio announcers, supermarkets, beverage bottlers and ballpark scoreboards, are hastening the everyday use of meters, liters and grams. ...a road sign outside Fergus Falls reads, ST. CLOUD 100 MILES OR 161 KILOMETERS. Other signs note that 55 m.p.h. equals 88 kilometers per hour.»