SINGH R S, . (2019). INTRODUCTION TO PRINCIPLE OF PLANT PATHOLOGY. NEW DELHI: OXFORD UNIVERSITY PRESS.
SINGH R S, . 2019. INTRODUCTION TO PRINCIPLE OF PLANT PATHOLOGY. NEW DELHI: OXFORD UNIVERSITY PRESS.
SINGH R S, . INTRODUCTION TO PRINCIPLE OF PLANT PATHOLOGY. NEW DELHI: OXFORD UNIVERSITY PRESS. 2019.
