NEW YORK (AP) _ Dr. Mario E. Jascalevich, whose 1976 murder trial turned into a test of journalists' rights to protect news sources, died in his native Argentina, his relatives said.

He died of a cerebral hemorrhage in Mar del Plata last September.

After one of the longest criminal trials in New Jersey history, he was acquitted of charges that he killed three patients to discredit surgeons who performed the operations.Jascalevich said the charges were concocted by a prosecutor and a New York Times reporter, M.A. Farber.

Farber refused to turn over his notes, was declared in contempt and sent to jail for 40 days. The court fined the Times $286,000.Gov. Brendan T. Byrne pardoned Farber and the newspaper in 1982 and $101,000 was returned.

MONSON, Mass. (AP) - Timothy Geer, A 14-year-old boy who expected to die of complications from muscular dystrophy and Elephant Man's disease, died of pneumonia Sunday at Wing Memorial Hospital in Palmer.

Timothy appeared earlier Sunday on a Springfield TV station's broadcast of local Easter Seals' fund-raising efforts. He presented $220 he helped his family collect over the weekend and $10 of his own, challenging classmates at Monson Junior-Senior High School to match his donation.

NEW YORK (AP) - John-Michael Tebelak, a playwright who wrote the book for the rock-gospel hit ''Godspell,'' was found dead Tuesday. He was 36.

Tebelak wrote the script for ''Godspell'' 14 years ago as a master's thesis at Carnegie-Mellon University in Pittsburgh. With music by Stephen Schwartz, it opened at the Cafe LaMama in 1971 before transferring to Off-Broadway and Broadway. The play also was made into a movie and has become a staple of traveling companies.