The Big Blue Marble - 1974 US River was released on:

USA: 1975

Tributaries are - Wakarusa River Big Blue River Republican River Smoky Hill River

# Arikaree River # Big Blue River # Big Nemaha River # Calamus River # Cedar River # Elkhorn River # Keya Paha River # Little Blue River # Little Nemaha River # Loup River # Middle Loup River # Missouri River # Niobrara River # Nishnabotna River # North Fork Elkhorn River # North Loup River # North Platte River # Platte River # Republican River # Snake River # South Fork Elkhorn River # South Loup River # South Platte River # West Fork Big Blue River # White River # Wood River

I'm guessing that the White Nile is called the big long river because it is the longest out of the other one, the Blue Nile. However, the Blue Nile provides roughly 2/3 of the Nile's water supply.

An ocean,a river, a pool, a sink, a pond, or anywhere with the blue stuff(water) filling in a big hole