)
original_year = models.IntegerField(_('original publication year'), null=True, blank=True)
pd_year = models.IntegerField(_('year of entry into PD'), null=True, blank=True)
)
original_year = models.IntegerField(_('original publication year'), null=True, blank=True)
pd_year = models.IntegerField(_('year of entry into PD'), null=True, blank=True)
gazeta_link = models.CharField(_("gazeta link"), max_length=255, blank=True)
collections = models.ManyToManyField("Collection", blank=True, verbose_name=_("collections"))
gazeta_link = models.CharField(_("gazeta link"), max_length=255, blank=True)
collections = models.ManyToManyField("Collection", blank=True, verbose_name=_("collections"))