{"product_id":"a-treatise-on-the-calculus-of-variations-arranged-with-the-purpose-of-introducing-as-well-as-illustrating-its-principles-to-the-reader-by-means-of-problems-9781314605815","title":"A Treatise on the Calculus of Variations. Arranged With the Purpose of Introducing, as Well as Illustrating, Its Principles to the Reader by Means of Problems","description":"\u003cp\u003eCarll, Lewis Buffett\u003c\/p\u003e","brand":"HardPress","offers":[{"title":"Default Title","offer_id":54354098454863,"sku":"9781314605815","price":22.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/hardpress.net\/products\/a-treatise-on-the-calculus-of-variations-arranged-with-the-purpose-of-introducing-as-well-as-illustrating-its-principles-to-the-reader-by-means-of-problems-9781314605815","provider":"HardPress","version":"1.0","type":"link"}