1. Handbook_of Statistics and Statistical Methods
https://drive.google.com/file/d/0B9FI_1ZRQa7MWjNVWmhxaVU4NW8/view?usp=sharing
2. Textbook of Pharmacognosy and Phytochemistry
https://drive.google.com/file/d/1OHgEJUk3iJsEbMVv1I__x9bxyjHZYOzk/view?usp=sharing
3. Pharmacognosy
https://drive.google.com/file/d/12iWSnmiKhXb_i1cLYaGqewSZ-bQC6ppk/view?usp=sharing
4. Hand Book of Photosynthesis
https://drive.google.com/file/d/0B9FI_1ZRQa7MZ0pZQWpZdXRucjQ/view?usp=sharing