Summary: The International Conference on Magnetic Resonance and Relaxation in Ljubljana, Yugoslavia in 1966 addressed physical problems in magnetic resonance, new techniques, and applications in physics, chemistry, and biology. Discussions, short communications, and sessions covered various topics such as electron spin resonance, superconductivity, acoustic resonance, nuclear spin-lattice relaxation, and more. The conference highlighted studies in glycerol, protein solutions, relaxation processes, intermolecular forces, and spin-phonon interactions, providing insights into the correlation between relaxation times and molecular dynamics of fluids. Techniques included pulse methods, continuous measurements, and dynamic nuclear polarization, leading to advancements in understanding magnetic relaxation in solids, liquids, and gases. The research aimed to determine unknown parameters of spin-phonon coupling, which are crucial for accurate calculations of relaxation transitions and other phenomena, contributing to the field of magnetic resonance and relaxation science. The event was a significant scientific gathering acknowledged by various organizations, showcasing valuable contributions from researchers and providing a stimulating platform for scientific exchange.