Canadian Porcupine

How porcupines cause great amount of 31 damage to lumber industry and farm crops; types of food consumed in four seasons of year. (15 minutes, color, silent) Cancer Education U.S. Department of the Army, 1949. Operation of mobile x-ray clinic in South; how to alert townspeople through advance announcement; x-ray all citi- 41 zens; educate toward self-examination, and check on possible cases of inall cipient cancer. 32, 41