Singh, R.S .
Introduction to principles of plant pathology / Textual Documents R.S.Singh. - New Delhi : Oxford & IBH Publishing company , 1984. - 534 : 506 ; .
632 / SIN/IN
Introduction to principles of plant pathology / Textual Documents R.S.Singh. - New Delhi : Oxford & IBH Publishing company , 1984. - 534 : 506 ; .
632 / SIN/IN