*0011481256
*008831125s1980    xx#           000 0 eng
*019  $bk
*08230$a387
*100  $aGjølberg, Ole$_133285300
*245  $aThe substitution of steam for sail in Norwegian ocean shipping, 1866-1914$ba study in the economics of diffusion
*300  $aS.135-146
*773  $tScandinavian economic history review$gVol.28nr 2 (1980)
*999  $z8300040726$anorart:8300040726
^