Johannes Albertus Erwee

• Trends in the construction of dwelling units (whites) in the Port Elizabeth/Uitenhage and East London/King William's Town regions, 1970-1978, including additions and alterations
• Development region D
• Port Elizabeth shopping study
• Profile of Port Elizabeth's black retail trade
• Secondary industry in the Port Elizabeth/Uitenhage Region
• The Port Elizabeth metropolitan area
• Trends in property sales and valuations in Port Elizabeth, Uitenhage and Despatch, 1969-1971
• Trends in the construction of dwelling units (whites) in Port Elizabeth, Uitenhage and Despatch, 1970-1972
• Trends in the construction of dwelling units (whites) in Port Elizabeth, Uitenhage and Despatch, 1970-1975
• Trends in the construction of dwelling units (whites) in Port Elizabeth, Uitenhage, and Despatch, 1970-1976, including additions and alterations
• Trends in the construction of dwelling units (Whites) in the Port Elizabeth-Uitenhage and East London-King William's Town regions, 1970-1979, including additions and alterations
• Trends in the construction of dwelling units (whites) in the Port Elizabeth-Uitenhage and East London-King William's town regions, 1970-1980, including additions and alterations