Danielle:
Thanks for your question and for your interest in WikiTree and G2G.
So far this is what I've found for your grandmother:
"United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VSGW-J6Y : accessed 05 Dec 2013), Virginia Bietsch, 14 August 1996; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
For Merle Kenneth Biestch and family:
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KQH5-JMV : accessed 05 Dec 2013), Merle K Bietsch in household of Merle K Bietoch, Ward 3, Chambersburg, Chambersburg Borough, Franklin, Pennsylvania, United States; citing enumeration district (ED) 28-9, sheet 2A, family 20, NARA digital publication of T627, roll 3509.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XH34-WDR : accessed 05 Dec 2013), Merle K Bietsch in household of William H Bietsch, Chambersburg, Franklin, Pennsylvania, United States; citing enumeration district (ED) 0006, sheet , family 333, NARA microfilm publication .
I hope this helps in some way,
Keith