Sadhna Sargam has been focusing on Lata Mangeshkar's Bengali
which comprises mostly of the marvelous
songs of Salil Chowdhury for Lata.
The two songs of Rahul Dev Burman she has recorded are Lata's Aami Boli
Tomai (details of the album unavailable with me at the moment) and Amar Malatilata
(Sagarika, 1997, "Amar Malatilata", #311110). In another Album "Alor
Bahar" (Sagarika, 1999, #31156 in which she has also sung popular tunes of Sachin Dev
Burman, Madan Mohan and Shankar-Jaikishen with Bengali lyrics, she has sung Lata's Na Koi
Umang Hai from Kati Patang (Na Cholar Chhando Nei, lyrics Atanu Chakravarty).