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O.A. Tingelstad leading the commencement procession.

O. A. Tingelstad observes students in the classroom.

O.A. Tingelstad leading the commencement procession.

Oscar and Alfield Tingelstad pictured with others in front of their home.

Oscar A. Tingelstad

Oscar A. Tingelstad

Oscar A. Tingelstad. Taken 1923.

Oscar A. Tingelstad. Taken 1923.

Oscar A. Tingelstad. Taken 1923.

Oscar A. Tingelstad. Taken 1923.