Analysis of information sources in references of the Wikipedia article "Yusof Ishak" in English language version.
Yusof Ishak Secondary School was established in 1965 as Jubilee Integrated Secondary School. It was an integrated school offering secondary education to an enrolment of 984 pupils and 37 teachers of two streams, in English and Malay. On 29 July 1966, then Prime Minister, Mr. Lee Kuan Yew declared open Yusof Ishak Secondary School (YISS) at Jubilee Road. We are the only school to be named after a President of our Republic.
These pictures were personally taken by President Yusof Ishak during his pilgrimage to Mecca in 1963.
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: CS1 maint: numeric names: authors list (link)These pictures were personally taken by President Yusof Ishak during his pilgrimage to Mecca in 1963.