scp Ed. ,// 32 p.

scp Ed. ,// 25 p.

scp Ed.

scp Ed. ,// 62 p. ,// ilustr. fotografia

Office of the General Secretary People's National Congreso & Ministry of National Development Ed. ,// 16 p.

scp Ed.

Centro de Impresion Educative Ed. ,// 32 p.

28 p.

8 p.

Casa de Estudios del Socialismo Ed. ,// 12 p.