I N the course of compiling and editing the Guide to Photocopied Historical Materials in the United States and Canada the condition of many resources for the study of local and regional history was brought forcefully to the attention of editors and others concerned. What was demonstrated beyond question was that reports on photocopied manuscripts indicated that, like an iceberg, only an eighth of the mass could be seen. Many manuscripts were submerged in the files of the repositories, unnoticed, unused, or simply unknown. This prevalent phenomenon indicates either that historians are ignorant of source materials available or that, because the materials are not readily available, historians do not use them. The major problem for the historian or other researcher is to know what is available and then to find his materials arranged for easy use. Subsidiary but directly related to the historian's problem is that of the depository, to preserve its resources and to make them known. Librarians and archivists are well aware that many of their manuscripts and other source materials are literally falling to pieces from age, wear, and lack of satisfactory storage conditions. One of many examples discovered by the American Historical Association's Committee on Documentary Reproduction is the pressing need for preservation of Swedish-language newspapers, a superb source for the study of an immigrant group and its adjustment to a new life in the Middle West. Published about a century ago, most of these newspapers are now disinte-