# S4 method for chronologies,numeric
[[(x, i)# S4 method for collunits,numeric
[[(x, i)
# S4 method for contacts,numeric
[[(x, i)
# S4 method for datasets,numeric
[[(x, i)
# S4 method for publications,numeric
[[(x, i)
# S4 method for samples,numeric
[[(x, i)
# S4 method for sites,numeric
[[(x, i)
# S4 method for speleothems,numeric
[[(x, i)
# S4 method for taxa,numeric
[[(x, i)