The Golden book encyclopedia of natural science.

the long version

As part of the push towards mastery of the sciences in the early 1960's, Golden Book published this Encyclopedia of Natural Science. The subtitle on the cover of each volume is "A world survey of birds, mammals, insects, fish, flowers, trees, rocks, stars and all other fields of natural history". A typical page would have two or three articles with one or two fairly accurate color drawings. The tone was informative, not conversational. The articles were written at the reading levels for children between perhaps age 10 through adult.