Converting root files to hbook ntuples

Hello,
is there anyway I can convert root files to hbook ntuples ? I know the reverse can be done.

I just did a google search of the string “hbook to root” and I found a few references in particular this one:

hep.umn.edu/minos/WebDocs/Ca … s0022.html

Do not ask me details about it I am not the author.