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Laboratory experiments on the food preferences of the black rat (Rattus rattus L.)

✍ Scribed by JAMIL AHMAD KHAN


Book ID
114701843
Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
446 KB
Volume
54
Category
Article
ISSN
0024-4082

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## Abstract By the use of a satisfactory technique, excellently preserved spermatogenetic tissue was had both for Rattus rattus and Rattus norvegicus. The careful examination of twelve spermatogonial cells of the former species and of twenty in the latter species shows that R. rattus has forty dipl