학위논문(석사) - 한국과학기술원 : 경영공학부, 2018.2,[iii,30 p. :]
수평적 제품차별화▼a수직적 제품차별화▼a친환경 인증제도▼a인증 기준; Horizontal product differentiation▼avertical product differentiation▼aeco-label▼acertification standard
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