books.google.com.au - Oceans cover over 70% of the planet's surface and are essential to life on earth, yet their deepest mysteries remained unexplored until very recently when 20th century technological advances allowed the vast expansion of our frontiers of knowledge, and worldwide interest in oceanography grew rapidly.Combining...https://books.google.com.au/books/about/Oceanography.html?id=2LsGkDIPVkUC&q=occur&utm_source=gb-gplus-shareOceanography
