Merriam-Webster
Webster s Third New International Dictionary of the English Language Unabridged
This book was edited by Philip Babcock Grove. It ws published in Springfield by Merriam-Webster. The 2002 edition is listed in BIP for $129 and $149, with no explanation that I can find for the two prices.
The preface of this book says: This edition shows as far as possible the pronunciations prevailing in general cultivated conversational usage, both informal and formal, throughout the English-speaking world. It does not attempt to dictate what that usage should be.
In 1961, when this edition was first published, the public was shocked to find in the usage notes a new concept of acceptability of usage.often without qualification. It has been said that it was the most controversial reference book of the generation.