I found this preview site of Wayne's Erbsons early Clawhammer tab book and I am having difficulty with the tab style. Not sure if this is the same in the most recent edition, but there are no bar lines and I'm not sure what the up pointing arrow means. Perhaps this is deliberate as it is only a preview?
http://books.google.com.au/books?id=hGu5unMeiMcC&pg=PA33&lpg=PA33&dq=cold+rain+and+snow+clawhammer+banjo+tab&source=bl&ots=ErC2G9ui6I&sig=ez3I9OHRnJi_T5dTF4XZfePgFkQ&hl=en&sa=X&ei=XqoiUebHJcueiAfAp4DIBg&ved=0CDMQ6AEwAQ#v=onepage&q=cold%20rain%20and%20snow%20clawhammer%20banjo%20tab&f=false
