Matches in Library of Congress for { ?s ?p Substitution (Economics) Mathematical models.. }
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- 75328171%2F%2Fr84 subject "Substitution (Economics) Mathematical models.".
- 80008628%2F%2Fr962 subject "Substitution (Economics) Mathematical models.".
- 80117806%2F%2Fr85 subject "Substitution (Economics) Mathematical models.".
- 80118528%2F%2Fr84 subject "Substitution (Economics) Mathematical models.".
- 80514851%2F%2Fr852 subject "Substitution (Economics) Mathematical models.".
- 90165396 subject "Substitution (Economics) Mathematical models.".
- 92040657 subject "Substitution (Economics) Mathematical models.".