Difficult Children -- See Problem children Here are entered works on children with behavior difficulties due to emotional instability or social environment.
Digestion -- See Also Nutrition Here are entered works on the sum of the physiological processes involved in the assimilation and utilization of nutrients for proper body functioning and health. This heading may be subdivided by place to indicate the nutritional status of a group of people in the place. Works on the food and drink regularly consumed by an individual or group of people are entered under Diet. --subdivision Nutrition under classes of persons and ethnic groups; and subdivision Nutritional aspects under diseases and types of diseases, e.g. Cancer--Nutritional aspects