Depending on the specific database you are using, "121991" may also refer to:
In legal contexts, such as Virginia Tax rulings , the number represents an informative document (Ruling 91-306) issued on December 12, 1991 , regarding employer income tax withholding for retirement plans. 91-306 | Virginia Tax 121991
One of the most prominent documents associated with this timeframe and topic (specifically from 1991) is a report published by the under the Assistant Secretary for Planning and Evaluation (ASPE) . Depending on the specific database you are using,
A comprehensive summary of what was known about the psychological and physiological bonds between infants and caregivers at that time. such as Virginia Tax rulings