Assertion: heading | /r/HasProperty | added
Facets:
Source sentences:
text: Headings and subheadings can be added by clicking then in the extra toolbar line which now appears.
text: Established heading: A heading that is authorized for use in other MARC records as a main entry (1XX), added entry (700-730), or series added entry (440 or 800-830) field or as the lead element in a subject access (600-655; 654-657) field.