“…These studies have analyzed American (e.g., Namenwirth, 1969bNamenwirth, , 1973, British (e.g., Weber, 1978Weber, , 1981Weber, , 1982a, Dutch (Gallhofer, 1978;Gallhofer andSaris, 1979a,b, 1980;Saris and Gallhofer, 198 l), Swedish (Rosengren,198 1) and German (Mohler, 1978;Klingemann et al, 1982b) texts. Taken as a whole, these studies indicate that content analysis may be the preferred, indeed, in some cases, the only way to generate valid and reliable quantitative indicators spanning long periods of time.…”