https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&startRecord=0&maximumRecords=15&page=1&query=%28gallica%20all%20%22Marriage%20contract%20of%20Pierre%20Eustache%20Desguerrouere%20Desroziers%22%29&filter=provenance%20all%20%22harvard%22