Summer School Tennis Tournament: All matches through the quarter finals for men and the semifinals for women must be played by Thursday, August 10. Updated drawsheets are in the Dean's Office and the Union.

Summer School Ping Pong Tournament: All third round matches must be played by Saturday, August 5. An updated drawsheet is posted in the Dean's Office.

August 4--Friday

8D--Last day to withdraw (no adjustment of fees).


Concert: Harvard Summer Pops Band, conducted by Thomas G. Everett. Hatch Shell, Charles River Esplanade. Free.

Harvard Summer School Film Series: 'Mash", 8 and 10:15 p.m.; Science Center B; $1.

Southern African Solidarity Group: "La Guerre est Finie", 7:30 and 10 pm., $1.25.

Dance Concert: Danny Grossman Dance Company. 8 p.m., Memorial Hall. Free.

August 5--Saturday

Dance Concert: See yesterday's listing. See film listings for August 4.

August 6--Saturday

Memorial Church Service, 11 a.m. The preacher will be the Reverend E. Spencer Parsons.

Harvard Hillel. Jewish Coffee-House and Amateur Hour. Hillel House, 8:30 p.m. $1:00 admission.

Harvard Anti-Nuclear Group: "Danger: Radioactive Waste", 7 and 9 pm. ; Science Center D.