Assertion: public library's collection | /r/HasProperty | postage and revenue stamps
Facets:
value: for periods
type: TEMPORAL
value: for almost all countries
type: LOCATION
Source sentences:
text: The collections include postage and revenue stamps, postal stationery, essays, proofs, covers and entries, "cinderella stamp" material, specimen issues, airmails, some postal history materials, official and private posts, etc., for almost all countries and periods.