Nine processes of devotional service to the Lord (CC and other books)

Expressions researched:
"Devotional service comprises nine prescribed practices" |"devotional service in nine different forms" |"devotional service, comprising the nine following methods" |"devotional service, which is executed in nine different ways" |"nine devotional activities" |"nine devotional services" |"nine different kinds of bhakti-yoga" |"nine different kinds of devotional service" |"nine different modes of devotional service" |"nine different processes of devotional service" |"nine different spiritual activities" |"nine different transcendental means of devotional service" |"nine elements of devotional service" |"nine kinds of activities" |"nine kinds of bhajana" |"nine kinds of devotional activities" |"nine kinds of devotional service" |"nine kinds of different process of worship" |"nine kinds of different varieties of service to Krsna" |"nine kinds of services" |"nine methods for realizing devotional service" |"nine principles of service activities" |"nine processes for executing devotional service" |"nine processes of devotional service" |"nine processes one can follow in the execution of devotional service" |"nine stages of devotional service" |"nine transcendental processes" |"nine types of devotional service"

Notes from the compiler: Vedabase query: "devotional nine"@10