Vimala Thakar gave lectures and seminars all over the world for over 30 years. The publication series Contact with Vimala has published these lectures and some issues are available for download here. 

Contact with Vimala Thakar 1977 #1
Contact with Vimala Thakar 1977 #2
Contact with Vimala Thakar 1978 #3
Contact with Vimala Thakar 1978 #4
Contact with Vimala Thakar 1979 #5
Contact with Vimala Thakar 1979 #6
Contact with Vimala Thakar 1980 #7
Contact with Vimala Thakar 1980 #8
Contact with Vimala Thakar 1981 #9
Contact with Vimala Thakar 1986 #20
Contact with Vimala Thakar 1987 #21
Contact with Vimala Thakar 1988 #23
Contact with Vimala Thakar 1988 #24
Contact with Vimala Thakar 1991 #29