It is crucial to note that Petrović wrote two distinct types of works titled Logika :
Most digital copies of circulating today are bootleg scans from personal libraries. These scans are often of low quality (handwritten marginalia, faded Cyrillic or Latin script), missing pages, or poorly OCR’d. This makes them difficult to index by Google Scholar, hence the reliance on direct file searches. Gajo Petrovic Logika.pdf
There is no single, official, perfect link for Gajo Petrovic Logika.pdf . Unlike contemporary eBooks, this text belongs to the "gray literature" of 20th-century Eastern European thought. Finding it requires effort: searching digital forums, requesting scans from Balkan university friends, or learning to read Serbo-Croatian characters. It is crucial to note that Petrović wrote