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An Introduction to Symbolic LogicSusanne K. LangerI. The Study of Forms
II. The Essentials of Logical Structure
III. The Essentials of Logical Structure (continued)
IV. Generalization
V. Classes
VI. Principal Relations Among Classes
VII. The Universe of Classes
VIII. The Deductive System of Classes
IX. The Algebra of Logic
X. Abstraction and Interpretation
XI. The Calculus of Propositions
XII. The Assumpions of Principia Mathematica
XIII. Logistics
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