Regarding the claim that devotees have difficulties maintaining Krishna consciousness by only doing book selling with not enough street chanting, Prabhupada remarked that if things deteriorate that is another thing, but it is not the fault of book distribution. Book distribution must not be neglected.
Your servant, Brahmananda Swami, Personal Secretary
Seen: ACBS (initialed by hand)
Letter to Ramesvara Prabhu, 25 October, 1974