You might want to address the implications ofthe apparent absence of a copyright notice. (law.stackexchange.com)
Crook KI, Perkins SL and Greiner EC: Apparent absence of Parahaemoproteus lophortyx in north Florida populations of Bobwhite Quail (Colinus virgianus). (charlestonvrc.com)
A key feature of this view is the apparent absence of any felt need to articulate a «policy» on this new race problem. (firstthings.com)