Author first outlines what constitutes community action" and then suggests three broad categories into which most examples of such action may be placed. (Editor/MB)

In reference to Johs. Clausen's article, Quo Vadis, AAMD?'', appearing in the same journal, the author generally disagrees with Clausen's viewpoints on the classification of mental deficiency. (CB)

In reference to Johs. Clausen's article, Quo Vadis, AAMD?'', appearing in the same journal, the author disagrees with Clausen's viewpoints on the classification of mental dificiency. (CB)

In reference to the various commentaries on his articles, Quo Vadis, AAMD?,'' appearing in the same journal, Johs. Clausen notes points of agreement and disagreement with the various authors. (CB)

Research made possible by a National Science Foundation Institutional grant to the University of Arizona. (VM)

New filing rules have been developed for the catalogs of the Library of Congress. This article discusses preliminary considerations about the functions of large bibliographic files, the complexities of cataloging, the interaction between users and catalogs, and ways to simplify arrangement. (Author)

Focus in this article is on a taxonomy approach to mental retardation nursing but which could be developed for other clinical specialties as well. (Editor/MB)

The discussion centers around the dimensions of classification and experience in the study of art, literature, the social sciences, and philosophy. (DB)

Proposes and explicates a classification scheme of world environmental problems. Identifies research questions requiring answers. Physical-linkage effects, subdivided into global and regional problems, and social-linkage effects, subdivided into pecuniary and non-pecuniary effects, are each illustrated by examples. (AL)

The paper advocates an educationally focused definition of problems and procedures in educating handicapped children, with emphasis on the aptitude by treatment interaction model as a guide for both instructional and research activities. (Author)

Explored is the possibility that two distinct patterns of hyperkinesis exist (hyperactive and hyperreactive), each with its own behavioral and etiological features. (KW)