Journal of Equine Science Vol.11, No.4, December 2000

CONTENTS Originals Comparison of Head Movement and EMG Activity of Muscles between Advanced and Novice Horseback Riders at Different Gaits ――Kayo TERADA Relationship of the Type of Social Organization to Scent-Marking and Mutual-Grooming Behaviour in Grevy's (Equus Grevyi) and Grant's Zebras (Equus burchelli bohml) ――Rikako KIMURA Genomic Organization in the Amino Acid Coding Sequence of Equine CYP17 Gene ―― Telhisa HASEGAWA, Fumio SATO and Nobushige ISHIDA African Horsesickness Virus Infection in Adult Mice ――Kenichi SAKAMOTO, Kenji KAWASHIMA, Minoru NARITA, Masanobu KAMADA and Akio FUKUSHO Contents of Journal of Equine Science Author Index Subject Index

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