2024 Ohio Code 1555.01 – Coal research and development definitions

2023 Ohio Code 1555.01 – Coal research and development definitions

2020 Ohio Code 1555.01 – Coal research and development definitions

2018 Ohio Code 1555.01 – Coal research and development definitions

2016 Ohio Code 1555.01 – Coal research and development definitions

2015 Ohio Code 1555.01 – Coal research and development definitions

2014 Ohio Code 1555.01 – Coal research and development definitions

2013 Ohio Code 1555.01 – Coal research and development definitions

2009 Ohio Code 1555.01 – Coal research and development definitions