@misc{Brundorg1988,
author = {Brundorg, H. },
title= {Cohort and period fertility for Norway, 1845–1985},
year = {1988},
URL = {http://www.ssb.no/emner/historisk_statistikk/rapp/rapp_198804.pdf},
publisher = {Statistisk Sentralbyra},
address = {Oslo},
}