More than a month after nearly 200 tenants had their leases terminated at Cambridge’s EMF building, a few of them are continuing to fight to preserve – in some way or another – their former art spaces. Last month, several former tenants submitted a “Protected Land Petition” to the Cambridge Historical Commission. In it, they ask the city to designate the EMF building as a historic landmark. “There is historical value to that building,” said Steve Onderick, one of the former tenants who has been working to save the former EMF building since his lease was terminated.