http://www.historic.org.nz/TheRegister/RegisterSearch/RegisterResults.aspx?RID=4678
http://www.historic.org.nz/TheRegister/RegisterSearch/RegisterResults.aspx?RID=4685
http://www.historic.org.nz/TheRegister/RegisterSearch/RegisterResults.aspx?RID=135
http://www.marthamine.co.nz/corn_pump.html
http://www.historic.org.nz/TheRegister/RegisterSearch/RegisterResults.aspx?RID=134
http://www.historic.org.nz/TheRegister/RegisterSearch/RegisterResults.aspx?RID=4673