Redirected from 1920s BC
(3rd millennium BC - 2nd millennium BC - 1st millennium BC)
Significant persons:
Inventions, Discoveries, Introductions:
... median age is 41 years. For every 100 females there are 92.6 males. For every 100 females age 18 and over, there are 90.2 males. The median income for a household in the ...