אונטערשייד צווישן ווערסיעס פון "מאנאפאל"

|pages= 208

|chapter= VIII: Monopoly and the Social Responsibility of Business and Labor

|last= Blinder

|first= Alan S

|quote = A pure monopoly is an industry in which there is only one supplier of a product for which there are no close substitutes and in which is very difficult or impossible for another firm to coexist}}</ref>

 

 

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