किसी संगठन में समन्वय का सबसे मूलभूत और प्रभावी संरचनात्मक साधन किसे माना जाता है?

In administrative terminology, 'Hierarchy' refers to:

In a sound democratic administration, which two key principles must always go hand in hand?

Who stated, 'Coordination is the first principle of organization and includes within itself all other principles which are subordinate to it and through which it operates'?