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References

 1.  Increasing ROI  Lipton, David (October 2002). Foodservice and Hospitality.
 2.  Staff Training  Lipton, David (September 2002). Foodservice and Hospitality.
 3.  Augmenter la rentabilit√©  Lipton, David (October 2002). Foodservice and Hospitality.
 4.  Formation du personnel  Lipton, David (September 2002). Foodservice and Hospitality.
     
     
     
     
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