Introduction to Logic

Basic Set Theory

A Book of Set Theory

Naive Set Theory

Set Theory and Logic

First Course in Mathematical Logic

Computer-Assisted Instruction at Stanford, 1966-68: Data, Models, and Evaluation of the Arithmetic Programs

Problems And Solutions In Mathematical Olympiad (Secondary 1)

The Philosophy of Set Theory: An Historical Introduction to Cantor's Paradise

A Concise Introduction to Pure Mathematics: Edition 4

Universal Algebra: Fundamentals and Selected Topics

Elements of Set Theory

A Beginner's Further Guide To Mathematical Logic

The Incompleteness Phenomenon

Journey to the Edge of Reason: The Life of Kurt Gödel

Pythagorean Fuzzy Sets: Theory and Applications

The Ecology, Exploitation and Conservation of River Turtles