It is also sometimes referred to as Comment elles dorment, after its opening track.

Jean-Marie Périer was credited for the front cover photography.

The single "Il est cinq heures, Paris s'éveille" was number one on the French charts for one week, from 23 March 1968.

Garage rock band Black Lips covered "Hippie Hippie Hourrah" on their third LP, Let It Bloom, released in 2005.

Words by Jacques Lanzmann and Anne Ségalen.