INTERNATIONAL COOPERATION.

Following is a list of titles and authors: Unified Measurements of Electrical Capacitance in the Member Countries of the Economical Mutual Aid Council (COMECON). By I. N. Krotkov and T. M. Gushchina. Development of Standard Methods of Certification of Benzoic Acid. By Yu. I. Aleksandrov and V. P. Varganov. COMECON Work in the Field of Ionizing Radiations. By M. F. Yudin, F. M. Karavaev, and G. P. Ostromukhova. Checking System for Means of Measuring the Composition of Gases. By D. K. Kollerov, A. V. Bobylev, D. O. Gorelik, and B. Ya. Gornshtein. Recommendations of the Council of Mutual Economic Aid for Establishing Uniformity of the Measurement of pH Values of Aqueous Solutions. By M. Yu. Gorina. Basic Trends in the Activities of the COMECON Permanent Commission on Standardization left bracket PKS SEV right bracket in Relation to Standardization and Measurement of the Geometrical Parameters of Surface Quality. By V. I. . Kiparenko and V. S. Luk'yanov. Current State and Perspectives of the Development of Works within the Framework of the Council of Mutual Economic Aid in the Area of Medical Measuring Equipment and Metrology. By R. S. Dadashev and R. I. Utyamyshev.