This excellent resource was designed particularly for the director of amateur choirs.
Singing is a Physical Reaction to a Mental Conception
Posture-Breathing-Attack
Making a Choral Tone
Warming Up to Sing
The Communicative Power of Choral Music
Spinning a Choral Line
Making Choral Music Musical
The Flexibility of the Human Voice
The Quality of Dynamics
Mood Establishes Tonal Qualities
Modification of the Vowel and the Lift
Seating Formations for Choral Groups
The Conductor's Responsibility In Making Choral Tone