fix: fields 041, 046, 246, 720 and 856
-
041 $a not mandatory -
246 mandatory if applicable -
720 typo "ISNI" -
856 add $h & $g to optional subfields -
046/1 Type of entity : (blank) - No information provided, 1 - Work, 2 - Expression, 3 - Manifestation
Edited by Renaud Boyer