This is the heart of traditional logic. Petrović guides the reader through:
However, I can help you in two ways:
The most commonly referenced version of the book is the 1984 edition, published by Element in the Croatian language. This edition, with an ISBN of 9531972915, spans 220 pages. While later editions exist, the 1984 publication is often the specific target of digital searches, as it represents a mature and widely circulated version of Petrović's pedagogical work. Gajo Petrovic Logika.pdf