Restricted generalization, bias, and loss of power that may result from matching groups
[by] Julian C. Stanley and Ellen Y. Beeman.

APA Citation

Stanley, J. C., Beeman, E. Y. (1957). Restricted generalization, bias, and loss of power that may result from matching groups. [Madison? Wis.].

MLA Citation

Stanley, Julian C, and Ellen Y Beeman. Restricted Generalization, Bias, And Loss of Power That May Result From Matching Groups. [Madison? Wis.], 1957.

Warning: These citations may not always be complete (especially for serials).