Columbia subject headings:
Animals--Infancy.
Mother and child.
Parental behavior in animals.
Primates--Behavior.
Rodents--Behavior.
Harvard subject headings:
Animals--Infancy
Mother and child.
Parental behavior in animals.
Primates--Behavior
Rodents--Behavior
Princeton subject headings:
Animals--Infancy.
Mother and child.
Parental behavior in animals.
Primates--Behavior.
Rodents--Behavior.