A Georgetown University student disciplinary board had decided to issue a letter of reprimand to one of three students charged by campus police with disorderly conduct. The charges stemmed from a demonstration outside a dormitory lounge where former secretary of stated Henry Kissinger was giving a lecture last month.

The three member adjudication board voted Thursday night to reprimand David Alcantara, 20, chairman of the Latin American Student Union, for his part in the March 12 demonstration. The board dismissed similar charges against two other students, Margaret Yoklavic, 19., and Carol Emigs, 21.

Alcantara said yesterday that he will appela the reprimand. If the reprimand is upheld it will be included in his student file until his graduation and then destroyed, said Lucy Moore, one of the two directors of the Student board.

Kissinger, a full professor at Georgetown who lecturers at the School of Foreign Service, had hust begun his talk when about 50 students congregated in a hallway and started changtin "Kissinger Off Campus," witnesses said.

The three-member board, composed of students in the School of Foreign Service, heard testimony from Campus police, foreign service Dean Peter Krogh and the three students. About 100 students attended the hearing Thursday night.