المؤلفون: William Elford Leach (identifier), William Elford Leach (collector)
URL الوصول: https://www.europeana.eu/item/840/NHMUKXZOOX1979X427?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCa
المؤلفون: T Elford. Poynting
URL الوصول: https://www.europeana.eu/item/9200143/BibliographicResource_2000069457170?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCa
URL الوصول: http://europeana.eu/portal/record/9200143/BibliographicResource_2000069457170.html
المؤلفون: Olsson-Steel, Duncan, Elford, W. G.
URL الوصول: https://www.europeana.eu/item/336/uuid_3e340daf_b56d_496d_bba1_e6530dfd7db4?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCa
المؤلفون: William Elford Leach (identifier), W Swainson (collector)
URL الوصول: https://www.europeana.eu/item/841/NHMUKXZOOX1979X288X3?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCa