Letters to the Editor.

Presents several letters to the editor. Comment on the two "planning" articles "The Application of a Model for Health Care Service in a Rural Setting," by Rhesa L. Penn and "Changing State Laws Regulating Health Manpower," by Steven Mosow, published in the January 1973 issue of the "American Journal of Public Health"; Discussion of an article related to the lactose intolerance in the nonwhite population, published in the November 1972 issue of the "American Journal of Public Health"; Focus on the association between abnormal lactose tolerance tests and milk rejection in Negroes.