I feel compelled to correct some errors in articles on Czechoslovakia carried in the Outlook section on June 3.

In both the articles, the new deputy interior minister is cited as being Jiri Ruml, the editor of Lidove Noviny, the main independent newspaper in Prague. The new deputy to the controversial interior minister Richard Sacher is Jan Ruml, the son of Jiri Ruml. He is about 36 years old and used to work as an orderly under the Communist regime.

Regarding the mystery that surrounds the death of Jan Masaryk, Henry Brandon {"Prague Diary: New Hope, Old Wounds"} cites the surviving Masaryk relatives as "convinced that his was a 'self-inflicted' death." That is patently untrue. The surviving Masaryk relatives, Anna and Herberta Masaryk and Herberta's daughter, Charlotta Kotik, have never even entertained the idea that his death was anything but a KGB murder even though the witnesses have all been gotten rid of over the years. In fact, one citation not used in the Claire Sterling book on the subject comes from Herberta and Anna, who told me when I was living in Prague in 1983-86 that "Uncle Jan was a great gentleman and he would never have jumped in his pajamas."

As to the 70,000 Soviet troops in Milovice, it would seem unusual that 80 percent of all the Soviet troops in Czechoslovakia would be located in one town. In fact they were all over the western and northern sectors of the country. WENDY W. LUERS President, Charter Seventy Seven Foundation New York