Which pair of scientists stated the principle of equilibrium for a population's genetic makeup?

1. The equilibrium principle carries the names of its two authors. 2. English mathematician Godfrey Hardy and German physician Wilhelm Weinberg stated it. 3. They stated the principle of equilibrium in the early twentieth century. 4. It describes the population's genetic makeup. _Source: OpenStax Biology 2e (CC BY 4.0), Ch 19 'The Evolution of Populations', sections 19.1-19.3_