1. CONTRIBUTIONS TO THE ULTRASONIC STUDY OF MOLECULAR INTERACTIONS IN THE DICHLOROMETHANE BENZENE MIXTURES. Authors: A. CIUPE, I. LENART.2. CONTRIBUTIONS TO THE ULTRASONIC STUDY OF INTERNAL PRESSURE IN ALCOHOL - CARBON TERTRACHLORIDE MIXTURES. Authors: I. LENART, A. CIUPE.3. INTERMOLECULAR INTERACTIONS IN ORGANIC LIQUIDS. Authors: A. CIUPE, I. LENART.