4-H Embryology Day 7 Candling Classroom Presentation Lancaster County 4-H (Nebraska) 5:58 4 years ago 76 363 Скачать Далее
4-H Embryology Initial Classroom Presentation Lancaster County 4-H (Nebraska) 6:37 4 years ago 2 758 Скачать Далее
4-H Embryology Initial Presentation Lancaster County 4-H (Nebraska) 16:31 9 years ago 2 649 Скачать Далее
Illinois 4-H Chick Embryology - Module # 4 "Egg Candling" Dan Jennings 8:34 4 years ago 484 Скачать Далее
Introduction to the Embryology Hatching Program North Carolina 4-H 1:00 2 years ago 291 Скачать Далее