Notebooks (which outlined peoples concerns in the Great Fear (French Revoution))
Cahiers Élisabéthains was created in 1972.
Cahiers d'art ended in 1960.
Cahiers d'art was created in 1926.
Yes, the phrase les cahiers ("the notebooks") is in the plural in French.
Cahiers pour l'Analyse was created in 1966.
Cahiers Octave Mirbeau was created in 1994.
Cahiers du cinéma was created in 1951.
Most common usage would be des cahiers or les cahiers. Or, if a specific number is desired: deux cahiers, etc.
"Mes cahiers" is masculine in French because "cahiers" is a masculine noun and the possessive adjective "mes" agrees with the gender of the noun it precedes.
Cahiers Européens de l'Imaginaire was created in 1988.
Les Cahiers du Sud ended in 1966.
Les Cahiers du Sud was created in 1925.