- Better business bureaus
- Boards of trade, other than security and commodity exchanges
- Business associations, other than civic and social
- Chambers of Commerce
- Contractor’s associations
- Growers’ associations, not engaged in contract buying or selling
- Growers’ marketing advisory services
- Industrial standards committees
- Junior Chambers of Commerce
- Manufacturers’ institutes
- Merchants’ associations, not engaged in credit investigations
- Public utility associations
- Real estate boards
- Shipping and steamship company associations
- Trade associations
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