Digital images of 15 dine hindī śikhun hindī bāṃlā spīkiṃ kors, a guide to learning Hindi and Bengali. Written by em guptā, published by Rajendra Library. Date of publication unknown.
"The original material is owned and held by Samantak Das. Access enquiries should be directed to Samantak Das via the School of Cultural Texts and Records, Jadavpur University, Kolkata.".