Penn Strike Half Over

Library and dining-hall workers at the University of Pennsylvania returned to work Monday although 700 maintenance, operating engineers and animal-lab workers remain on strike for the fourth consecutive week.

The library and dining-hall workers' settlements both call for a six-per-cent wage increase in January and another one in November 1976.

Robert Coryell, director of the University of Pennsylvania news bureau, said yesterday that negotiations with the remaining strikers have resumed but so far without success.