Sixty-six percent of the questionnaires were returned. Sixty-eight letters were analyzed.
Information elicited from the questionnaires was grouped into the following three categories: language, writing style, and skills needed by foreign correspondents.
Letter samples were examined for format, writing style.
60 เปอร์เซนของแบบสอบถามที่ถูกส่งกลับมา จดหมาย68ฉบับถูกนำมาวิเคราะห์