The planets today contributions to the Royal Society's commemoration of the quincentenary of the birth of Nicolaus Copernicus (Royal Soc., 1974)
Aus: Proceedings of the Royal Society of London ; Ser. A, Vol. 336, Nr. 1604 m.d.T.: A symposium on planetary science in celebration of the quincentenary of Nicolaus Copernicus, 1473 - 1543