FAQ All the full-text files here are produced in the PDF format, which are graphic rather than textual. When you view them, you might need to adjust the display percentage for a clearer view. However, as you increase the display percentage, the texts may not fit in within the frame of the window, and so you have to use the horizontal and vertical scroll bars to get a complete view. This may cause some inconvenience in viewing the full texts. Therefore, we strongly recommend that you save the PDF files to your local hard disk and print them out before you read them. On-line subscription is available only for individuals and organizations that place their orders directly to us. Agencies should still resort to the conventional way, that is, ordering by mail.