حساب المثلثات الكروية العنصر غير ممنوع المعرّف الرئيسي للمحفوظات: ark:/81055/vdc_100022540022.0x000001لغة التوصيف الموسّعة غير المعالجة: <Subject RecordID="049-002560313"> <Repository RepositoryId="10" CountryId="10">British Library</Repository> <Type SubjectTypeId="12">Term</Type> <Entry>Spherical trigonometry</Entry> <Authority SubjectAuthorityId="13">LCSH</Authority> <MDARK>ark:/81055/vdc_100022540022.0x000001</MDARK> <IsPreferred>Preferred</IsPreferred> <ArchiveDescriptionSubjectRelationships> <RelatedArchiveDescriptionSubject TargetNumber="032-002479495"> <TargetRecordId>032-002479495</TargetRecordId> </RelatedArchiveDescriptionSubject> <RelatedArchiveDescriptionSubject TargetNumber="040-002558395"> <TargetRecordId>040-002558395</TargetRecordId> </RelatedArchiveDescriptionSubject> </ArchiveDescriptionSubjectRelationships> </Subject>