_:nb9f2d31a806d44318adc320c0f5b62a4xb0
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebSite>
<https://www.vitalsource.com/en-uk/products/a-course-in-differential-equations-with-boundary-stephen-a-wirkus-v9781498736060>