About 50 protesters marched yesterday to protest what they called the "union busting" policies of a law firm interviewing at the Sheraton Commander Hotel on Garden Street.

Members of the Harvard Labor Law Project accuse the Philadelphia firm of Morgan, Lewis and Brockius of firing employees who join unions as well as intimidating employees in their everyday practice.

Holding signs saying "Morgan Lewis, Merchant of Fear" and "Morgan Lewis, Pinstriped Bully," protesters marched from Pound Hall to the hotel, shouting "Hey, hey, ho, ho, union busting's got to go" and handing out literature about the company.

"The main point is to send a message that Harvard Law students are not mercenaries who will do anything for $80,000," said second-year law student Andrew Levin, president of the group. "We care about the morality of a practice."

In particular, protesters criticized a 1989 anti-union campaign by USAir, one of the firm's clients.

"It is the worst thing that can hap- pen when your union is broken and you arecompletely vulnerable," said Michael C. Duff, afirst-year law student who was a member of theTeamsters' Union chapter that USAir attacked.

"Workers should have a right to decide forthemselves to join unions," said Levin. "It is aquestion of democracy in the workplace."

The protesters formed a revolving circle on thesidewalk, handing out information defining unionbusting and a list of union-busting companies tolaw students attending inter views.

John H. Shenefield, a managing partner at thefirm's Washington, D.C, office said in responsesto the protest, "Everybody has a right to protestin this country according to what they believe nomatter how misinformed or ignorant they may be."

The project, possibly the first law students,organization to sponsor boycotts of law firmsrecruiting students, was formed in 1984. It comestogether each year to draw attention to allegedanti-union activity by recruiting firms, he said