The records at NEHGS are copies of the records from the Massachusetts Archives, and those run only through 1915. For the 1930s you would have to get the record from the Brockton City Clerk or the Massachusetts Registry of Vital Records and Statistics. Having either one do a search for you is unlikely if you cannot be more precise with the date. You could hire a local researcher to check the indices at the Registry and get a copy of the record.
Dale H. Cook, Member, NEHGS and MA Society of Mayflower Descendants; Plymouth Co. MA Coordinator for the USGenWeb Project Administrator of http://plymouthcolony.nethttp://plymouthcolony.net