...The whole subject of the validity of warning colorationhas recently been brought up for reconsideration by the illuminatinginvestigations of Mr... 
Clarence M. Weed 「Butterflies Worth Knowing」
...Handley (1966b:762) and Starrett and Casebeer(1968:12) expressed doubt as to the validity of the currently usedsubspecific names in this species...
J. Knox Jones 「Noteworthy Records of Bats From Nicaragua, with a Checklist of the Chiropteran Fauna of the Country」
...A careful review of these snakes is needed to verify the validity of the characters used to separate the subspecies and to determine areas of intergradation...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...The taxonomic validity of Pseudoficimia pulcherrima remains doubtful,for only minor characters distinguish it from P...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...Okada (1934:17) questioned the validity of H...
Robert G Webb 「Some Reptiles and Amphibians from Korea」
...First, it is necessaryto determine the validity of the genus itself...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
..." However, a check of old correspondence and accession records at the National Museum confirmed, beyond doubt, the validity of the locality data for these specimens...
John M. Legler 「A New Tortoise, Genus Gopherus, From North-central Mexico」
...The fact that estimates of the total population and the percentage-compositionagree in most respects lends support to the validity of both methods ofanalysis...
James Everett Deacon 「Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas」
...Waite has so generously admitted the validity ofmy answer to his criticism as regards meteors, I can do noless than admit that he scored one against me in his secondargument...
Various 「Astounding Stories, May, 1931」
...Hequestions the validity of his argument that bodies of greater size andbrightness should not serve the smaller, though not bright, and thatheaven should move, while the Earth remained at rest...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...So long as the manner in which the planets came into beingcontinues an open question, conclusions about their timeof birth must remain of doubtful validity...
George C. Comstock 「A Text-Book of Astronomy」
...But in the proof of this greattheorem two influences were neglected, either of which isfatal to its validity...
George C. Comstock 「A Text-Book of Astronomy」
...He hadnot mentioned the affair of 1616 because he thought that order did notapply to this book in which he proved the lack of validity and ofconclusiveness of the Copernican arguments...
Dorothy Stimson 「The gradual acceptance of the Copernican theory of the universe」
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