Heves megyei aprónyomtatványok 21/R

tures and contributed posters will be distributed among active participants upon registration. Abstracts of all communications accepted will be published by direct photoreproduction of the author's memuscript. It is therefore essential that the instructions given in the attached form be strictly adhered to. The deadline for sending the abstract is June 30, 1981.

Invited lectures and an overview on poster materials, written by members of the Organizing Committee, will be published by Akadémiai Kiadó, Budapest. Authors of posters are kindly requested to support reviewers by supplementary materials as reprints, preprints, etc. The volume is expected to appear early in 19P2 and it can be ordered from the above publisher. Invited lectures will be translated and published in Hungarian language, too.

POSTERS

A poster area of approximately 1 m x 1.5m plus a horizontal table surface will be available to each author. A supply of aids as thumbs tacks, tape and marking pens will also be on hand. Authors are encouraged to present three-dimensional material (ball-and-stick models, etc.). Each poster should include a brief title and a short summary. Note that posters should be readable from a distance of 2-3 m so lettering, tables and figures must be large enough in size.

REGISTRATION AND FEES

Participants are asked to complete the attached registration form. The complete form should be mailed to the Organizing