By ΠΠ΅ΠΠΎΠ½ ΠΡΡΡΠ°Π²
ΠΠ½ΠΈΠ³Π° ΠΎ ΠΏΡΠΈΡ ΠΎΠ»ΠΎΠ³ΠΈΠΈ Π½Π°ΡΠΎΠ΄ΠΎΠ² ΠΈ ΠΌΠ°ΡΡ.
Book about the psychology of peoples and crowds.