Historians Do It With Multiple Sources Measures 10.5 cm x 14.8 cm - Lovely 350 gsm card. - Blank on the inside. - Envelope included. £2.00 Quantity: at £2.00 each Add To Basket A lovely history greetings card. Historians do it with multiple sources, because it's the best way to help write your dissertation (and start an argument). Size: 10.5 cm x 14.8 cm. Colour: Orange.