...The dogs are avaluable asset to this people and these two men were dependent on theirlittle teams to a greater extent than on the plates and cups of tinwhich they received in exchange for them... 
Matthew A. Henson 「A Negro Explorer at the North Pole」
...This bird is a valuable asset toAustralia, and yet thoughtless farmers used to shoot it...
John Albert Leach 「An Australian Bird Book」
...Now, on a fishing jaunt, the presence of any kind of dog is aliability; not an asset...
Albert Payson Terhune 「Further Adventures of Lad」
...His ear felt as if it were being pulled fromhis head; and in this uncomfortable moment a newly awakened instinctmade Baby Papayuchisew discover his wings as a fighting asset...
James Oliver Curwood 「Baree, Son of Kazan」
...worked for us as a collector, and between March and June he collected and saved many valuable specimens; his knowledge of the forest and its inhabitants was a great asset to our work...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...He possesses plenty of initiative, whichis an invaluable asset on active service...
G. P. Cuttriss 「Over the Top With the Third Australian Division」
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