Livres associés

Scale insects on deciduous and ornamental trees. A report to the State board of horticultural commissioners.

Scale insects of the Santa Cruz peninsula.

The red or orange scale

The purple scale

• The outbreak of Pseudococcus sacchari, Ckll., on the sugar cane of Egypt.
  Auteur(s): Hall, Wilfrid John.

• Nile control : a statement of the necessity for further control of the Nile to complete the development of Egypt and develop a certain area in the Sudan, with particulars of the physical conditions to be considered and a programme of the engineering works involved
  Auteur(s): Macdonald, Murdoch
• Nile control works : note on a series of c ontrol works to regulate the irrigation water supply of the nile valley
  Auteur(s): Macdonald, Murdoch
• Nile control : a statement of the necessity for further control of the Nile to complete the development of Egypt and develop a certain area in the Sudan, with particulars of the physical conditions to be considered and a programme of the engineering works involved
  Auteur(s): Macdonald, Murdoch