The conditions of economic progress.

I tiakina i:
Ngā taipitopito rārangi puna kōrero
Kaituhi matua: Clark, Colin, 1905-
Hōputu: Pukapuka
Reo:Ingarihi
I whakaputaina: London, Macmillan, 1951.
Putanga:2d ed. completely rewritten.
Ngā marau:
Ngā Tūtohu: Tāpirihia he Tūtohu
Kāore He Tūtohu, Me noho koe te mea tuatahi ki te tūtohu i tēnei pūkete!