These are vintage issues of the American Killifish Association's Journal for Feb 1977, Nov/Dec 1977 and Mar/April 1978. The publication is in English and comes in a physical format. It covers the topics of killifish breeding and maintenance and was published monthly under the title "AMERICAN KILLIFISH ASSOCIATION". The issue has not been modified and is a great addition to any collection of books and magazines. Learn how the master breeders did it back then. A lot of the breeding techniques still hold true today. Other issues for different years are available. Contact me if you have any questions.