HWAHAK KONGHAK HWAHAK KONGHAK, Vol.15, No.6, December, 1977 Entire volume, number list ISSN: 0304-128X (Print) In this Issue (4 articles) 415 - 423 니트로실황산이 대기오염에 미치는 영향Influence of Nitrosyl-Sulfuric Acid on the Air Pollution Smog Formation손선관 425 - 432 Acetonitrile-Water-Salt계의 액액평형The Liquid-Liquid Equilibria for Acetonitrile-Water-Salt Systems도갑수 433 - 463 분쇄장비의 선정과 사용의 실제A New Comprehensive Look at Size Reduction Technology and Its Equipment목영일, 박방삼 465 - 470 서독에서의 화학석고 처리Treatments of Chemical Plaster in West Germany이한훈