Christopher T. Cross, Taniesha A. Woods, and Heidi Schweingruber, editors ; Committee on Early Childhood Mathematics, Center for Education, Division of Behavioral and Social Sciences and EducationNational Academies Pressc2009
[by] Christopher Cross, in collaboration with Major General William R. Arnold ... illustrated with 34 official Signal corps photographsE.P. Dutton & Company, Inc[1945]