Differential diagnosis -- See Diagnosis, Differential For differential diagnosis in particular diseases, make additional entry under the heading [name of disease]--Diagnosis, e.g. 1. Cancer--Diagnosis. 2. Diagnosis, Differential.
Differentiation, Sex -- See Sex differentiation Here are entered works on the differentiation of male and female tissues and organs during embryogenesis.
--subdivisions Economic conditions--Regional disparities and Economic conditions--(time period)--Regional disparities under names of regions, countries, etc.
1
Difficult children -- See Problem children Here are entered works on children with behavior difficulties due to emotional instability or social environment.
Diffusion of innovations -- See Also Technology transfer Subdivided by the region or country receiving the technology. Where applicable, also make an additional entry under this heading with subdivision for the region or country transferring the technology.
