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Discusses the history of the X-15 flight program, how its results yielded information valuable for later space programs, and the experiences of the program's twelve test pilots.
"There are 1195 species of birds belonging to 88 families occurring in China, but until now no one volume in English has described them all. Intended for use as a field guide as well as a descriptive catalog,this volume offers an account for each species with emphasis on diagnos…
"There are 1195 species of birds belonging to 88 families occurring in China, but until now no one volume in English has described them all. Intended for use as a field guide as well as a descriptive catalog, this volume offers an account for each species with emphasis on diagno…
