@misc{Hardy_Alister_Clavering_(1896-1985)_World, author={Hardy, Alister Clavering (1896-1985)}, howpublished={online}, publisher={Penguin Books}, language={eng}, title={World shipping : a note book on seaways and sea trade abd a maritime geography of routes, ports, rivers, canals and cargoes}, keywords={statki, żegluga}, }