• The School of Music and Dance presents a senior recital by soprano Angelica Keller at 7:30 p.m. in Holsclaw Hall.

• Yuma Hall, 1107 E. North Campus Drive, sponsors the America Red Cross Bloodmobile from 5 to 8 p.m.

• The University Activities Board presents an alternative folk concert by Otto Reality from 11 a.m. to 1 p.m. in the Cellar.

• The Women's Resource Center sponsors "Labor Struggles in the U.S.," a lecture by SalomĒn Baldenegro at 5 p.m. in the Cellar. A screening of the film "Salt of the Earth," follows the lecture.

• The geosciences department sponsors Geoscience Daze today and tomorrow from 9 a.m. to 5 p.m. in the Arizona Ballroom. About 50 discussions and posters will be presented by graduate students from the UA and other schools in Arizona and Mexico.

• The mathematics department presents a discussion of "Shell Start-up Files", a Unix/Utilities workshop at 2 p.m. in Math Room 102.