publications Publications by the CMB-S4 Collaboration Snowmass 2021 CMB-S4 White Paper CMB-S4: Forecasting Constraints on Primordial Gravitational Waves CMB-S4 Decadal Survey White Paper CMB-S4 Science Case, Reference Design, and Project Plan CMB-S4 Technology Book, First Edition CMB-S4 Science Book, First Edition