Powell, I. (2004). The communist left and the labour movement in Christchurch up until the 1935 general election: A thesis submitted in fulfilment of the requirements for the degree of Master of Arts in History.

Powell, Ian. The Communist Left and the Labour Movement in Christchurch Up Until the 1935 General Election: A Thesis Submitted in Fulfilment of the Requirements for the Degree of Master of Arts in History. 2004.

Powell, Ian. The Communist Left and the Labour Movement in Christchurch Up Until the 1935 General Election: A Thesis Submitted in Fulfilment of the Requirements for the Degree of Master of Arts in History. 2004.