Estimation and mental computation :
1986 yearbook /
Harold L. Shoen, 1986 yearbook editor ; Marilyn J. Zweng, general yearbook editor.
APA Citation
Zweng, M., Schoen, H. L. (1986). Estimation and mental computation: 1986 yearbook. Reston, Va.: National Council of Teachers of Mathematics.
MLA Citation
Zweng, Marilyn, 1932-, and Harold L Schoen. Estimation And Mental Computation: 1986 Yearbook. Reston, Va.: National Council of Teachers of Mathematics, 1986.
Warning: These citations may not always be complete (especially for serials).