n.a set of three literary or dramatic works related in subject or theme

Trilogies
Trilogies
Trilogies
Film Trilogies: New Critical Approaches
Trilogies of histone lysine methylation as epigenetic landmarks of the eukaryotic genome.
[Congenital heart disease. II. Fallot's trilogies.]
Empowerment in general practice. The trilogies of caring.
P-adic L-functions and Euler systems: A tale in two trilogies
The Breath of the Dummy: Philip Roth's Nathan Zuckerman Trilogies
Falling into History: The Imagined Wests of Kim Stanley Robinson in the "Three Californias"and Mars Trilogies