1 Subjects: “...interval grey number...”

2 Subjects: “...grey relational analysis (GRA)...”

3 Subjects: “...grey mullets...”

4 Subjects: “...improved grey wolf algorithm...”

5 Subjects: “...grey wolf optimizer...”

6 Subjects: “...grey cattle...”

7 Subjects: “...grey entropy method...”

8 Subjects: “...grey prediction model...”

9 Subjects: “...grey correlation analysis...”

10 Subjects: “...South American grey fox...”

11 Subjects: “...grey correlation analysis...”

12 Subjects: “...grey DEMATEL...”

13 Subjects: “...grey literature...”

14 Subjects: “...grey group decision-making...”

15 “... for and respond to floods effectively. When flood protection measures exist, they generally rely only on grey...”

16 Table of Contents: “... -- Grey water reuse in Urban Areas -- The Necessary Documents for the Design Documentation for Water...”

17 Table of Contents: “... Membrane Driven Ultrafiltration and Biosorption -- Grey Water Recycling for Domestic Usage -- Studies...”

18 “... made their way into this book hover in a grey region between the singular and self-enclosed, on the one...”

19 “..., grey and green infrastructure, and risk management and resilience while embracing a holistic view...”

20 “... green and grey infrastructure system....”