The periodical is published to announce technical literature recently accessioned by the Air Pollution Technical Information Center (APTIC). For each accession, the bibliographic citation, an abstract, and the APTIC accession number are given. The subject fields are as follows: Emission sources; control methods; measurement methods; air quality measurements; atmospheric interaction; basic science and technology; effects-human health; effects-plants and livestock; effects-materials; economic aspects; standards and criteria; legal and administrative; social aspects; and general and miscellaneous. All abstracts are listed under one of the above subject fields. A subject and author index are included. The subject index consists of those terms that most clearly describe the information presented in the documents. The author index consists of personal authors which are arranged alphabetically. This issue contains abstracts 24194-27217.