MASSER IAN 550,916 DIFFUSION Diffusion and use geographic information technologies / ed. by Ian Masser and Harlan J. Onsrud. - Dordrecht [etc.] : Kluver Academic Publ., [1993]. - VII, 349 s. : wykr. ; 24 cm (NATO ASI Ser. Ser.D: Behavioural and Social Sciences ; vol.70) ISBN 0-7923-2190-1