Manual of plant diseases
Heald, Fredrick Deforest.
Manual of plant diseases - 2nd ed. - New York Mcgraw hill book 1933 - xii, 953 p. ill. 23 cm. - Mgraw hill publications in agriculture science .
Plant diseases
Virus diseases of plants--Diagnosis
581.2 / HEA
Manual of plant diseases - 2nd ed. - New York Mcgraw hill book 1933 - xii, 953 p. ill. 23 cm. - Mgraw hill publications in agriculture science .
Plant diseases
Virus diseases of plants--Diagnosis
581.2 / HEA