2024 CFR > Title 7 > Subtitle B > Chapter I > Subchapter C > Part 51 > Subpart B > Methods of Sampling and Calculation of Percentages

2023 CFR > Title 7 > Subtitle B > CHAPTER I > SUBCHAPTER C > PART 51 > Subpart B > Methods of Sampling and Calculation of Percentages

2022 CFR > Title 7 > Subtitle B > Chapter I > Subchapter C > Part 51 > Subpart B > Methods of Sampling and Calculation of Percentages – Methods of Sampling and Calculation of Percentages

2021 CFR > Title 7 > Subtitle B > Chapter I > Subchapter C > Part 51 > Subpart B > Methods of Sampling and Calculation of Percentages – Methods of Sampling and Calculation of Percentages

2020 CFR > Title 7 > Subtitle B > Chapter I > Subchapter C > Part 51 > Subpart B > Methods of Sampling and Calculation of Percentages