Official history of the New Zealand Engineers during the great war, 1914-1919 : a record of the work carried out by the feild [sic] companies, field troops, signal troop, and wireless troop, during the operations in Samoa (1914-15) ; Egypt, Gallipoli, Sinai, and Palestine (1914-1918) ; France, Belgium and Germany (1916-1919) ; and Mesopotamia (1916-1918)