Harrar, H. J. (1962). Cooperative storage warehouses. Harrar.
Lua i Stíl Chicago (17ú heag.)Harrar, Helen Joanne. Cooperative Storage Warehouses. New Brunswick, N. J.: Harrar, 1962.
Lua MLA (8ú heag.)Harrar, Helen Joanne. Cooperative Storage Warehouses. Harrar, 1962.
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