Lawyers for the Medical Area Employees Organizing Committee continued yesterday for the fourth day in their efforts to demonstrate that clerical and technical workers in the Medical Area perform different work in different conditions from similarly classified employees in other parts of the University.

Richard Levy, one of the committee's lawyers, said yesterday their case would show, "through the testimonies of employees and faculty, the unique nature of work at the Medical Area."

The organizing committee, which af- filtated itself with District 65 of the Distributive Workers of America last spring, is seeking to gain permission from the NLRB to hold a union forming section.

The University contends that a union limited to Medical Area Workers is not an appropriate bargaining unit under the National Labor Relations Act.

Edith Breakman a member of the committee testified yesterday that when she began working in the Medical Area in 1965, the only correspondence she remember receiving was from the Medical Area personnel office.

The organizing committee has tried to demonstrate that hiring and personnel procedures at the Medical Area are distinct from those of the University at large in an effort to show that Harvard treats the Medical Area as a separate entity.

Nelson G Ross an attorney serving as co-counsel for Harvard in the case introduced as evidence a letter from the central personnel office in Cambridge sent to Brickman when she was hired concerning a life insurance plan.

Brickman said she could not remember receiving the letter.

Levi also said the committee's case would center on showing work-related "hazards and dangers" unique to clerical and technical personnel in the Medical Area